Installation guide

HP THERMOSTAT
m
24 VAC HOT D
24 VAC COM
HEAT STAGE 2
COOL/HEAT
STAGE 1
INDOORFAN
RVS COOLING
EMERGENCY
HEAT
TYPICAL
FAN COIL
* IF AVAILABLE
HEAT
PUMP
...... i
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Fig. 7--Generic Wiring Diagram
(See Thermostat Installation Instructions
for wiring specific unit combinations.)
A02325
ODT
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
OUTDOOR THERMOSTAT
EMERGENCY HEAT RELAY
SUPPLEMENTAL HEAT RELAY
5. Set room thermostat to HEAT or (OOL and _im control to ON
or AUTO mode, as desired. Operate unit for a minimum of 15
minutes. Check system=refi'igerant charge.
To avoid equipment damage ensure compressor rotation is
cotTect*3=phase scroll compressors are rotation sensitive
*A flashing LED on phase monitor indicates reverse rotation
(See Fig. 8 and Table 2.)
This wil! not allow contactor to be energized.
*Disconnect power to unit and interchange 2 field-wiring
leads on unit contactor.
Step 13--Check Charge
Factory charge is shown on unit-rating plate. To check charge in
cooling mode, re*_r to Cooling=Only Procedure on unit wiring and
charging label.
COOLING=ONLY PRO( EDURE
NOTE: If superheat= or subcooling=charging conditions are not
favorable, charge must be weighed in accordance with unit-rating
plate +0.6 ozift of 3/8-in liquid line above or below 15 ft
respectively
EXAMPLE:
To calculate additional charge required for a 25=ft line set:
25 ft 15 ft 10 _ X 0.6 ozift 6 oz of additional charge
HEATING CHECK-CHART PRO(EDURE
To check system operation dnring heating cycle, refer to the
Heating Check Chart on outdoor unit This chart indicates whether
a correct relationship exists between system operating pressure and
air temperature entering indoor and outdoor units If pressure and
temperature do not match on chart, system=refi'igerant charge may
not be con'ect Do not use chart to adjust re['rigerant charge.
NOTE: When charging is necessaL'v during heating season,
charge must be weighed in accordance with unit rating plate +06
ozit't of 3/%in. liquid line above or below 15 f_ respectively.
Step 14--Final Checks
IMPORTANT: Before leaving job, be sure to do the _bllowing:
1. Securely fasten all panels and covers.
2. Tighten service valve-stem caps to li12=turn past finger-tighL
3. Leave User's Manual with owner. Explain system operation
and periodic maintenance requirements outlined in manual.
4. Fill out Dealer Installation Checklist and place in customer
file.
SEQUENCE OF OPERATION
With power supplied to indoor and ontdoor nnits, trans_brmer is
energized.
Cooling
On a call t'or cooling, thermostat makes circuits R-O, R-Y, and
R=G_ Circuit R-O energizes reversing valve, switching it to cooling
position. On 3-phase models with scroll compressors, the units are
equipped with a phase monitor to detect if the incoming power is
con'ectly phased [br compressor operation. If phasing is correct,
circuit R-Y energizes contactor, starting outdoor-fan motor and
compressor circuit. R-G energizes indoor unit=blower relay, start-
ing indoor-blower motor on high speed.