Product data

Page 18
Installation, Operation & Maintenance Manual (IOPCKKS60220510B1)
OPERATION
SOUND POWER RATINGS
A sound power level is a measure of the total noise radiated by the machine in all directions. It is a property of the machine and is
essentially independent of the measuring environment. Sound power levels are useful to equipment manufacturers, buyers, installers,
and users for:
t Calculating the sound pressure level from a machine at a given distance in a given environment.
t Comparing the noise output from different machines.
t Setting specifications for the maximum permitted noise from a machine.
t Comparing machines before and after modifications to reduce the noise.
Sound power is measured in watts or picowatts, and sound power levels are traditionally given in decibels (dB re 1pW). Refer table 8 for
sound power level of whole unit and table 9 for sound power levels of fan only.
ESP
IWG RPM BHP 63 125 250 500 1000 2000 4000 8000
DMS-190 5800 1 919 2.94 71.60 74.62 81.62 83.62 84.62 81.62 75.62 72.62 89.62
DMS-240 7400 1 981 4.65 73.45 76.45 83.45 85.45 86.45 83.45 77.45 74.45 91.45
DMS-260 8000 1 715 3.67 71.00 74.00 81.00 83.00 84.00 81.00 75.00 72.00 89.0
DMS-340 10000 1 797 6.06 74.87 77.87 84.87 86.87 87.87 84.87 78.87 75.87 92.87
Ref 1 x 10^-12 watts
RPM Kw BHP 63 125 250 500 1K 2K 4K 8K
DMS-190 5800
1 919 2.2 2.9 68.5 71.5 78.5 80.5 81.5 78.5 72.5 69.5 86.5
DMS-240 7400
1 981 3.47 4.7 72.5 75.5 82.5 84.5 85.5 82.5 76.5 73.5 90.5
DMS-
260 8000
1 715 2.74 3.7 69.8 72.8 79.8 81.8 82.8 79.8 73.8 70.8 87.8
DMS-340 10000
1 797 4.52 6.1 74.4 77.4 84.4 86.4 87.4 84.4 78.4 75.4 92.4
Total
(dBA)
Model No. CFM
Blower
dB(A)
Octave Band Frequency Hz
Model CFM ESP
Blower Octave Band Mid Frequency (HZ)
TABLE 8 : SOUND POWER LEVELS (DMS SABER UNITS)
TABLE
9
:
SOU
ND P
O
WER LEVEL
S
(S
TANDARD FAN
S)
VOLT FREE CONTACT
All Saber units are supplied with Volt free contact, Refer to lectrical
wiring schematic that are pasted inside the unit.
CAUTION
HOOK UP EMERGENCY SHUT - OFF BUTTON
SEQUENCE OF OPERATIONS OVERVIEW
For these units, the thermostat makes a circuit between “R” and
“Y1” for the first stage of cooling. The call is passed to the unit
control board (UCB), which then determines whether the requested
operation is available and, if so, which components to energize.
For electric heat units, the UCB passes the call to the electric
heater. In both cases, when the “W1” call is sensed, the indoor air
blower is energized following a specified heating delay. If at any
time a call for both heating and cooling are present, the heating
operation will be performed. If operating, the cooling system is
halted as with a completion of a call for cooling. Heating always
takes priority.
COOLING SEQUENCE OF OPERATION
1. CONTINUOUS BLOWER
By setting the room thermostat fan switch to “ON” the supply air
blower will operate continuously.
2. INTERMITTENT BLOWER
With the room thermostat fan switch set to “AUTO” and the system
switch set to either the “AUTO” or “HEAT” settings, the blower is
energized whenever a cooling or heating operation is requested.
The blower is energized after any specified delay associated with
the operation. When energized, the indoor blower has a minimum
run time of 30 seconds. Additionally, the indoor blower has a delay
of 10 seconds between operations.
3. NO OUTDOOR AIR OPTIONS
When the thermostat calls for the first stage of cooling, the low
voltage control circuit from “R” to “Y1” and “G’ is completed.
For first stage cooling, compressor #1, condenser fan motor #
1 & 2 are energized. After completing the specified fan on delay
for cooling, the UCB will energize the blower motor. When the
thermostat calls for the second stage of cooling, the low-voltage
control circuit from “R” to “Y2” is completed. Compressor # 2
is energized, provided it has not been locked out. If there is an
initial call for both stages of cooling, the UCB will delay energizing
compressor # 2 by 30 seconds in order to avoid a power in rush.
Once the thermostat has been satisfied, it will de-energize Y1 and