C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Vertical DOAS
R e v. : 0 1 / 3 1 / 1 3
24
C l i m a t e M a s t e r Wa t e r - S o u r c e H e a t P u m p s
Ground
Lug
Factory Supplied
Wiring
Main Power
Block In Unit
Main Power
Supply From
Disconnect Box
Ground Wire
L1
L2
Ground
Lug
Factory Supplied
Wiring
Main Power
Block In Unit
Main Power
Supply From
Disconnect Box
Ground Wire
L1
L2
L3
Electrical Wiring - Line Voltage
Electrical - Line Voltage
- All fi eld installed wiring, in-
cluding 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 con-
nections must be made with a length of fl exible 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.
Auxiliary Line Voltage Wiring
- A dedicated 115 VAC,
15 Amp circuit (by others) is required on all DOAS units
for operation of the factory installed Heating Evaporator
heat tape(s). Failure to connect heat tape(s) to a power
supply may lead to freezing and possibly failure of the
heat exchanger. Failure of, and/or damage caused by
the failure of a heat exchanger due to freezing will be
exempt from warranty coverage if the heat tapes are not
properly connected at the time of the failure.
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!
Wire and Fuse Sizing -
The fi eld-installed power
supply wires and overcurrent devices must be sized
to handle the minimum ampacity of the DOAS unit
without exceeding the maximum fuse size rating. Both
the minimum ampacity and the maximum fuse size are
printed on the unit rating plate.
High Voltage Connections -
On single phase units
the power supply must have 3 connections (2 power, 1
ground). On three phase units the power supply must
have 4 connections (3 power, 1 ground). Connect the
power supply wires to the main power block located in
the upper section of the electrical compartment.
Figure 4: Single Phase Wiring
Figure 5: Three Phase Wiring
