Service manual

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Vertical Stack
Rev.: 11/09/12
20
ClimateMaster Water-Source Heat Pumps
Electrical Wiring - Line Voltage
Electrical - Line Voltage
All fi eld installed wiring, including electrical ground,
must comply with the National Electrical Code as well
as all applicable local codes. Refer to the unit electrical
data for fuse sizes. Consult wiring diagram for fi eld
connections that must be made by the installing (or
electrical) contractor.All fi nal electrical connections must
be made with a length of fl exible conduit to minimize
vibration and sound transmission to the building.
WARNING! To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and secure
it in an open position during installation.
CAUTION! Use only copper conductors for fi eld installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.
 WARNING! 
 CAUTION! 
General Line Voltage Wiring - Be sure the available
power is the same voltage and phase shown on the unit
serial plate. Line and low voltage wiring must be done
in accordance with local codes or the National Electric
Code, whichever is applicable.
Power Connection - Line voltage connection is made
by connecting the incoming line voltage wires to the “L”
side of the contactor.
208 Volt Operation - All commercial 208-230 Volt units
are factory wired for 208 Volt operation. If supply voltage
is 230V, then the transformer must be rewired to the 230V
tap as illustrated on the wiring diagram by switching the
red (208V) and the orange (230V) wires at the contactor
terminal.
Blower Speed Selection – Units with PSC Motor
PSC (Permanent Split Capacitor) blower fan speed can
be changed by moving the blue wire on the fan motor
terminal block to the desired speed as shown in Figure
4. Most ClimateMaster units are shipped on the medium
speed tap. Consult submittal data or engineering
design guide for specifi c unit airfl ow tables. Typical unit
design delivers rated airfl ow at nominal static on medium
speed and rated airfl ow at a higher static on high speed
for applications where higher static is required. Low
speed will deliver approximately 85% of rated airfl ow.
An optional high static blower is available on some 816
models.
Blower Speed Selection – Units with ECM-X Motor
Fan speeds can be changed by moving wires on motor
terminal block shown in Fig. 4A. Use information in Table
5 to set CFM for your static.
Special Note for AHRI Testing: To achieve rated airfl ow
for AHRI testing purposes on all PSC products, it is nec-
essary to change the fan speed to “HI” speed, for ECM-X
motor products TRM15 and 24 wire to medium low (2),
TRM18 and 30 wire to medium (3) and TRM36 wire to
medium high (4). When the heat pump has experienced
less than 100 operational hours and the coil has not had
suffi cient time to be “seasoned”, it is necessary to clean
the coil with a mild surfactant such as Calgon to remove
the oils left by manufacturing processes and enable the
condensate to properly “sheet” off of the coil.
WARNING! Disconnect electrical power source to prevent
injury or death from electrical shock.
 WARNING! 
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Figure 4: PSC Motor Speed Selection
Figure 4A: ECM-X Motor Speed Selection
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