Service manual

CLIMATEMASTER WATER-SOURCE HEAT PUMPS
22
ClimateMaster Water-Source Heat Pumps
Genesis GR Series
Revised: 9 August, 2011
Electrical - Power Wiring
CAUTION! Use only copper conductors for eld installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.
Electrical - Line Voltage - All field 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 field connections that must
be made by the installing (or electrical) contractor. All
final electrical connections must be made with a length
of flexible conduit to minimize vibration and sound
transmission to the building.
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.
Figure 16: Single Phase Line Voltage Field Wiring.
Three phase wiring is similar except that all three
power wires are directly connected to the contactor.
Transformer
CXM
Control
Contactor -CC
BR
Low
Voltage
Connector
CB
L2
L1
Unit Power Supply
See electrical table for
breaker size
Grnd
Rev.: 5/17/01 B
Capacitor
WARNING! Disconnect electrical power source to prevent
injury or death from electrical shock.
CAUTION!
WARNING!
Power Connection
Line voltage connection is made by connecting the
incoming line voltage wires to the “L” side of the
contractor as shown in Figure 16. Consult electrical
tables for correct fuse size.
Transformer
On dual voltage units the installer must confirm that
the power supply and unit transformer wiring match.
Installer must rewire as needed. Refer to the unit wiring
diagram for proper connections.
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 17. Most ClimateMaster units are shipped
on the medium speed tap. Consult submittal data
or engineering design guide for specific unit airflow
tables. Typical unit design delivers rated airflow at
nominal static 37Pa on medium speed and rated airflow
at a higher static 100 to 125 Pa on high speed for
applications where higher static is required. Low speed
will deliver approximately 85% of rated airflow at 25
Pa. An optional high static blower is available on some
models.
Special Note for AHRI Testing: To achieve rated
airflow for AHRI testing purposes on all PSC products,
it is necessary to change the fan speed to “HI” speed.
When the heat pump has experienced less than 100
operational hours and the coil has not had sufficient
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.