ROOFTOP Air Conditioners D4IC-360, 480 (Cool only) B4IH-360, 480 (Heat pump) D4IG-360, 480 (Cool only + gas heating) Ref.
Index Page Page 1 - Description 5 7 - Operating limits 16 2 - Product nomenclature 5 8 - Performances D4IC/D4IG 17 3 - Characteristics 5 8.1.8.2.- 17 17 3.1.3.2.3.3.3.4.3.5.3.6.3.7.3.8.3.9.3.10.3.11.3.12.3.13.3.14.3.15.3.16.3.17.3.18.3.19.3.20.3.21.
Index 13.15.- Copper fin coils 13.16.- “Blue Fin” coils 13.17.- Mounting base (Roof Curb), fixed 13.18.- Mounting base (Roof Curb), adjustable Page 27 27 27 27 - 29 14 - Pulley adjustment and belt tensing 30 15 - DPC-1 programmable digital thermostat with communication 31 15.1.- Air conditioning modes 15.2.- Key functions 31 32 16 - Operation 32 16.1.16.2.16.3.16.4.16.5.
1 - Description Adequate for installing outdoors, either on the roof or on ground level. The D4IC series are cool only versions, but accept electric heaters for heating. The D4IG series are cool only versions that include gas burner heating. The B4IH series are reversible heat pump versions with optional electric heaters as backup. Factory supplied completely assembled, with all necessary tubing, connected and loaded, in one single assembly for shipping and handling, making installation easier and faster.
This aluminium surface causes minimum friction with the air, and is easy to clean. 3.4.- Base beams The base beams are fixed and provide a foundation for the entire unit. The beams have suspension lugs on the front surface that allow using a crane to locate the unit. 3.5.- Condensed water tray 3.11.- Control circuit 24 V control circuit that can operate with the optional DPC-1 (communication) thermostat, or a 24 V thermostat with control signals (Y1, Y2, G, O/B, W).
3.20.- Location the outdoor coil. On units with several compressors, it cannot defrost two circuits at the same time. Use the following guidelines to select an adequate location for these units. 1. This equipment is designed for outdoor installation only. 2. The condenser requires an unlimited air supply. Whenever possible to choose a location, locate the equipment on the north or east side of the building. 3. For ground level installations, use a level concrete slab of at least 100 mm. thick.
4 - Technical specifications and physical data 4.1.- D4IC (Cool only) and D4IG (Cool only + gas heating) Models Heating and cooling capacities (1) Heating (D4IC) kW 111.6 144.6 Nominal absorbed power in cool kW 42.4 52.2 Optional electric heater heating capacity (400 V) (2) kW 37 - 50 - 60 37 - 50 - 60 (P.C.I.) Total kW 130.7 130.7 (2) Nett kW 117 117 m3/h 12.8 12.8 Nº 4 4 A 21(x3) / 167 21(x2)+38 / 167 / 272 SCROLL SCROLL 3 3 12.7 / 12.7 / 12.7 12.7 / 12.
4.2.- B4IH (Heat pump) B4IH Models 360 480 Nett cooling capacity kW 107.6 140 Nominal absorbed power in cool kW 43 59.5 Heating capacities (2) kW 127.1 163.3 Nominal absorbed power in heat kW 41.9 56.7 Optional electric heater heating capacity (400 V) (2) kW 37 - 50 - 60 37 - 50 - 60 85 / 167 112 / 272 SCROLL SCROLL 3 3 13.7 / 13.7 / 13.7 13.7 / 13.7 / 27.9 Cooling capacities (1) Heating capacities (1) Nominal/start current Compressors A Type No.
4.3.- Weights of accessories Models kg 360 480 Economiser kg 93 93 Fixed manual outdoor air damper kg 75 75 Barometric extraction damper kg 64 64 Extraction fan (axial) kg 129 129 Mounting base (Roof Curb), fixed/adjustable kg 117 / 220 117 / 220 Electric heater kg 34 34 Hot water coil kg 54 54 High pressure drive (HPD) kg 0 44 Cu/Cu coils (evaporating + condensing units) kg 205 251 4.
TILTED 2200 C1 TILTED 195 1350 94 94 1760 SECTION Y-Y (BASE DETAIL) SIDE IMPULSE AIR DUCT CONNECTION OUTDOOR AIR INTAKE (WITH OPTIONAL ACCESSORY) C5 BOTTOM RETURN AIR DUCT CONNECTION C1 SIDE RETURN AIR DUCT CONNECTION ACCESS OUTDOOR COILS A6 C4 ACCESS HEATING/IMPULSE ACCESSORIES A5 BOTTOM IMPULSE AIR DUCT CONNECTION ACCESS COOLING CIRCUIT A4 C3 ACCESS ELECTRICAL BOX A3 C2 ACCESS INDOOR FAN AND COIL A2 2296 A4 VISTA X-X TOTAL EXTERIOR LUGS A3 2030 INDICATION OF MINIMUM CLEARA
Model D4IG (For further dimensions and details, as per Fig. 4A) A6 A6 A2 230 A1 G3 1095 G3 G1 1" BSP FEMALE G2 G1 GAS SUPPLY LINE CONNECTION G2 AIR INTAKE FOR COMBUSTION G3 COMBUSTION GAS DISCHARGE - Fig.
5.1.- Applications of upward ducts (bottom) (Fig. 5) 1. Return duct: - Access the return section through the access door (A1). - Loosen the 4 screws (8) that fasten the bottom return cover (C1) to the base of the unit. - Slide the cover out and away from the unit, thus uncovering the opening for duct connection. - Discard the cover. 2. Impulse duct: - Access the impulse section through access doors (A5). - Remove the inner cover (7) by loosening the screws that fasten it to the unit.
5.2.- Application of side ducts (Fig.6) 1. Return duct: - Remove and discard the cover (C3). - Connect the duct to the flange provided along the entire perimeter of the opening on the side of the unit. 2. Impulse duct: - Remove and discard the cover (C4). - Connect the duct to the flange provided along the entire perimeter of the opening on the side of the unit. 3. In both cases, make sure of air tightness between the duct and the panel of the unit. 4.
5.3.- Indoor coil condensed water drain ������ ������������������� - The condensed water drain line must have a siphon for correct discharge (see Fig. 7). - The diameter of the tubing used must be at least equal to the connection provided on the side of the unit. - Use sealing putty on male threads. - If it is necessary to install a drain line from the connection of the unit to a nearby drain, maintain a minimum 2 cm. pitch per each meter in length.
Typical job site wiring CONTROL WIRING CAUTION When connecting the power supply and control wiring to the unit, waterproof type wires must be used to avoid water or humidity getting into the unit during normal operation. These waterproof conditions also apply when a switch is installed at job site. COOLING/HEATING (DPC-1 24 VAC ELECTRONIC THERMOSTAT)) AUTO PROG AUTO 0h 2 Thermostat The ambient thermostat should be located on an inner wall, at about 1.5 m.
8 - Performances D4IC/D4IG 8.1.- Cooling capacities D4IC/D4IG-360 Air temperature in outdoor coil (DB) 27°C Return air m3/h Minimum flow 19.000 Nominal flow 21.000 Maximum flow 23.000 DB °C Total power kW 35°C Sensible power kW Intake temp. DB 30 27 24 22 Total power kW 46°C Sensible power kW Intake temp. DB 30 27 24 22 Total power kW Sensible power kW Intake temp. DB 30 27 24 22 23 127.8 80.8 62.5 44.2 - 121.3 78.6 60.2 42.0 - 109.3 74.9 56.6 38.2 - 19 115.8 108.
9 - Performances B4IH 9.1.- Cooling capacities B4IH - 360 Air temperature in outdoor coil (DB) 27°C Return air m3/h Minimum flow 19.000 Nominal flow 21.000 Maximum flow 23.000 DB °C Total power kW 35°C Sensible power kW Intake temp. DB 30 27 24 22 Total power kW 46°C Sensible power kW Intake temp. DB 30 27 24 22 Total power kW Sensible power kW Intake temp. DB 30 27 24 22 23 123.3 79.3 61.0 42.6 - 117.7 77.1 58.9 40.5 - 105.4 73.6 55.2 37.0 - 19 111.7 106.5 88.
9.3.- Heating capacities B4IH - 360 Return air DB °C m3/h Minimum flow 19.000 Nominal flow 21.000 Maximum flow 23.000 Outdoor air temperature (DB) °C -15 -10 -5 0 5 7 10 15 20 14 51.9 66.1 82.8 102.5 125.2 136.7 150.3 176.7 206.8 17 49.6 63.5 79.8 98.8 121.1 130.4 143.4 169.1 197.7 20 47.9 60.7 76.4 95.1 116.8 126.2 138.6 163.8 191.7 23 46.1 57.9 73.1 91.2 112.1 121.5 133.2 157.3 184.1 25 43.8 54.5 71.1 88.7 109.3 118.6 129.8 153.4 179.
10 - Characteristics of indoor fan Dual turbine fan, driven by one single belt drive motor. Motor pulley is of adjustable diameter at ½ turn intervals. Motor pulley (adjustable) Motor1 Fan pulley (fixed) Belt Model kW Casing type Ø pulley (mm) Ø shaft (mm) Ø pulley (mm) Ø shaft (mm) Length (mm) Ref. Amount 360 9.
11.3.- Models 480, applications with vertical ducts (bottom) Opening adjustment of motor pulley (No. of turns) Air flow m3/h 22 000 23 000 A.S.P. kW A.S.P. 0 575 11.1 1 515 10.4 2 450 3 390 4 5 6 24 000 25 000 26 000 27 000 28 000 kW A.S.P. kW A.S.P. kW A.S.P. kW A.S.P. kW A.S.P. kW 540 11.7 510 12.2 465 13.1 425 13.6 370 14.4 310 15.3 480 10.9 440 11.4 400 12.1 345 12.7 285 13.5 225 14.4 9.7 415 10.3 365 10.8 325 11.3 270 11.9 210 12.
13 - Accessories Definition: "OPTION" are factory fitted items supplied installed on the unit itself and ready for use; "ACCESSORY" are items that must be installed, fully or in part, at the job site. Section Description Option/Accessory 13.1 Modulating economiser, temperature control Option 13.2 Enthalpy probes for economiser Option 13.3 Surge pressure barometric damper Option or Accessory 13.4 Extraction fan (axial) Option or Accessory 13.5 Fixed outdoor air intake damper Option 13.
Dimensions of the economiser/fixed outdoor air intake rain hood 2040 910 - Fig. 9 - Location of economiser return air damper OUTDOOR AIR OUTDOOR AIR RETURN AIR DAMPER DAMPER SIDE RETURN DUCT RETURN AIR ATTENTION: INDICATE RETURN AIR DUCT LOCATION WHEN PLACING THE ORDER. BOTTOM RETURN DUCT - Fig.
13.2.- Enthalpy sensors for economiser Applicable when requiring an economiser control system that adapts best to the areas in which the humidity level is important. 13.3.- Barometric relief damper To relieve excess air pressure that can be generated within the building when an economiser or motor-driven damper is used. It is the most economic and adequate extraction system for installations in which return air is not ducted and an extraction of a maximum of 25% of the total impulse air flow is expected.
13.4.- Extraction fan (axial) This is the adequate extraction system when using an economiser or motor-driven damper and an extraction of over 25% of total impulse air flow is required, and the return is ducted (see graph in Fig. 12). The system comprises two axial fans located inside a rain hood, which also includes a surge pressure damper. Up to approximately 30% of outdoor air intake, it acts as a barometric damper.
13.5.- Fixed outdoor air intake damper Comprises a damper located at the outdoor air intake, and includes the same rain hood and aluminium mesh filters as the economiser. The damper is equipped with a manual opening device, and mechanical locking to fix its position once the adequate outdoor air percentage is achieved; always in accordance with the operating limits of the unit (see Fig. 13). 13.6.
the unit can operates correctly at minimum outdoor temperatures of -18° C. 13.10.- Electric heater Available for cool only and heat pump models. 37, 50 AND 60 kW capacities. Delivered assembled, inside the impulse plenum of the unit. Power supply to the heater must be independent of the general power supply, and be equipped with its own automatic switch (not supplied). See section No. 6.2. 13.11.- Hot water coil Located within the impulse plenum of the unit.
Fixed Roof Curb 50 50 50 0 90 50 17 RETURN AIR GASKET 16 85 50 50 12 7,5 67 0 80 13 50 90 55 0 22 Ø 14 0 5 72 25 90 0 25 170 90 18 5 72 25 7 20 2 7,5 12 50 11 25 60 14 0 Unit location 283 29 D CL UCT OS SE ED CT FR ION AM E 90 17 5 72 170 OU SU TDO PP O OR R T RETURN SIDE COMPRESSOR SIDE 77 ROOFTOP UNIT ROOF CURB 50 50 2955 RETURN DUCT * ( ) 1160 ( ) IMPULSE DUCT * SECTION A-A' Detail of typical Roof Curb application (fixed or adjustable)
Adjustable Roof Curb 50 50 50 0 90 50 17 RETURN AIR GASKET 16 85 H: MINIMUM HEIGHT ON LOWEST SIDE OF DUCT FRAME, DEPENDING UPON TYPE A, B or C INSTALLATION 50 50 13 0 67 0 80 13 H= 360 50 90 0 29 90 D CL UCT OS SE ED CT FR ION AM E 0 60 77 IMPULSE AIR 50 2 22 Ø 14 5 72 25 90 0 25 170 94 18 5 72 5 72 22 2 13 90 52 0 11 25 30 Unit location 17 25 7 170 20 0 OU SU TDO PP O OR R T RETURN SIDE COMPRESSOR SIDE 77 ROOFTOP UNIT ROOFCURB 50 50 2960
14 - Pulley adjustment and belt tensing 1.- Adjusting pulley - Loosen the belts. Loosen tensing screw "A". - Loosen studs "B" to release mobile rims "C". - Turn both rims, on the thread of the fixed core of the pulley, in the adequate direction to increase or decrease pulley aperture. Attention: Both channels must have the same clearance (the same number of opening turns). - Tighten studs to a maximum, coinciding with their seat in the fixed hub core of the pulley. 2.
15 - DPC-1 programmable digital thermostat with communication Cool COOL is displayed with the and static if not). With the front cover up, showing the front panel. The cover is lifted to access the controls only. Heat HEAT is displayed with the icon (with the sides flashing if under demand, and without sides if not). Internal view of the thermostat icon (flashing if under demand, Auto Both the system heating as well as cooling functions are enabled.
Air Conditioning mode key ���� Pressing this key in Normal Mode changes the current air conditioning mode (OFF, COOL, HEAT, AUTO, AUTO PROG, EMERG HEAT). Occupation mode key In Normal Mode it will change the current occupation or comfort mode (Day/Night), displaying the set point temperature next to the flashing thermometer. If pressed once again while still in the Adjust Mode, each occupation mode will be accessed one by one in a sequential and cyclic manner.
16.5.- Heating operation sequence with gas vated. If not, the start-up control is locked out and generates an alarm to the gas board, which resets IC1. The gas board (models D4IG) REQUEST FOR HEAT, 1: If the thermostat generates a demand for heat, the YKlon board activates the indoor fan and the gas control board (A6) generates a W1 output (terminal 41).
controlled by microswitches (30, 60, 90 minutes). Factory-set to 30 minutes. Defrost can be carried out only when the unit is in heat pump operation. Start: The following conditions should exist: - The compressor is in operation. - The liquid probe temperature is below -3° C for 3 minutes, or for 5 minutes if the outdoor temperature is below -5° C. - That the time period from the last defrost, 30 minutes, has expired.
17.3.- Low gas pressure (models D4IG) If gas supply pressure falls below the gas pressure switch (GS) set point, power supply to the ignition control circuit is cut off, and this circuit becomes inoperative. The gas equipment will reset automatically once the gas supply pressure goes above the pressure switch set point, and the start-up sequence will begin once again. See table 18.6 for gas valve and thermal switch adjustments. 17.4.
ADJUSTING FLYWHEEL 2ND STAGE + + V2 PBr LOCK SCREW T ADJUSTMENT OF MAIN REGULATOR + ADJUSTING FLYWHEEL 1ST STAGE PIN FOR READING OUTPUT PRESSURE TO THE MANIFOLD CONNECTING FLANGE V1 Pc PIN FOR READING INPUT PRESSURE PIN FOR READING MAIN REGULATOR PRESSURE Pa - Fig. 18 - IGNITION ELECTRODE BURNER SUPPLY MANIFOLD EXCHANGER PIPE BURNER FLAME (BLUE ONLY) BURNER - Fig.
18.6.- Adjustment gas valve/thermal switches D4IG model Burner model 360/480 N420 Heating capacity (kW) Gas valve adjustments (mbar) Gas type Total (P.C.I.) Nett 130,7 117 Heat switch limits (°C) Main regulator 2nd stage regulator 1st stage regulator Automatic reset Manual reset 10,5 GV1: 9 GV2: 8,8 4,5 82 93 2ND-H(G20) GAS VALVE GV1 GAS VALVE GV2 GV1 GV2 - Fig. 20 - Note: The GV1 gas valve corresponds to heat stages 1 and 3 of the unit.
19 - Maintenance 19.1.- General Maintenance operations should be carried out by qualified technical personnel only, updating the maintenance log book of each unit regularly. Attention: Before opening any access to the interior of the unit, all power supply should be turned off. To ensure proper operation of the units with minimum energy consumption and a long service life, a maintenance plan should be established.
- Indoor fan belts: Check correct condition and tension. If these are to be replaced, the replacements must be of the same type and size as the originals (see section No. 10), and recheck tension within the first 24 operating hours. See section No. 14 for tensing procedure. - Air filters: Replace disposable filters, or wash washable filters. For this purpose, remove the filters from the unit, sliding them out of their guide rails.
- - - - siphon are not obstructed. Make sure the water evacuates correctly. Prime the siphon (fill with water) if necessary. Outdoor coils: Eliminate any dirt or residues on the surface of both sides of the coils, and in the V-shaped air passage section formed by the coils. Clean the surface of the fins with a soft brush or compressed air, taking care not to damage them. As these are exposed to outdoor environmental conditions, it might be necessary to use water with an adequate detergent for cleaning.
19.2.- Gas heating units, D4IG Gas injectors Visually check for partial obstruction of the calibrated holes, and clean, if necessary (see section 19.3). Gas valve filter Caution: Close the gas supply tap to the unit before accessing the gas valves. Combustion air intake: Check for any obstruction by objects or dirt. Maintenance operations to be carried out by qualified personal at the beginning of the heating season: Check gas filter conditions in both valves, and clean or replace, as required.
- Fig. 25 - 19.4.- Cleaning heat exchanger With adequate combustion regulation, the heat exchanger pipes rarely require cleaning. If there is an accumulation of soot, these can be cleaned as follows: 1. Disassemble the gas valve/burner assemblies as per section 19.3. 2. Disassemble the smoke stack front panel (screws T3). This panel includes the 2 impulse/extraction fans. Take special care in not damaging the air tightness gasket (Fig. 26). 3.
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