Maritime Geothermal WH-Series, Installation And Service Manual

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1-Oct-2015 Page 7 002028MAN-01
UNIT DESCRIPTION
The WH-Series unit is a non-reversing single-stage water
to water heat pump, using R134a refrigerant. Although requiring
a source of 50°F or warmer, on the indoor side water can be
heated to as high as 160°F. This is as opposed to a water to
water heat pump using R410a refrigerant, which can use a heat
source as low as ~25°F but can achieve a maximum indoor wa-
ter temperature of only ~120°F.
The 50°F requirement means that the WH-series may use
a water well or ground loop source only in suitably warm cli-
mates. Possible alternate sources include grey water, an indus-
trial cooling loop, or the buffer tank of a conventional geothermal
heat pump.
UNPACKING THE UNIT
When the heat pump reaches its destination it should be
unpacked to determine if any damage has occurred during
shipment. Any visible damage should be noted on the carrier's
freight bill and a suitable claim filed at once.
The heat pump is well constructed and every effort has
been made to ensure that it will arrive intact, however it is in the
customer's best interest to examine the unit thoroughly when it
arrives.
(ELB) can be found inside the electrical box cover of the unit as
well as in the
Model Specific section of this manual. The Elec-
trical Tables in the Model Specific section and the ELB diagram
contain information about the size of wire for the connections, as
well as the recommended breaker size. Connections are as per
TABLE 1.
NOTE: A properly qualified electrician should be retained to
make the connections to the heat pump and associated
controls. The connections to the heat pump MUST CON-
FORM TO LOCAL CODES.
Installation Information
OPTIMUM PLACEMENT
The placement of a hydronic unit has negligible effects on
the operation of the system. For ground water systems, the unit
can be placed near the well water system, ground loop system
units can be place near where the header pipes enter the struc-
ture to keep the ground loop piping, heat pump and circulator
pump module in one location. The hydronic layout may make a
particular location ideal for the unit installation.
If possible the access panels should remain clear of
obstruction for a distance of two feet to facilitate servicing and
general maintenance. DO NOT STACK UNITS ON TOP OF
EACH OTHER . The cases are not designed to hold the weight
of another unit. Stacking should only be done with a proper rack
system able to hold a minimum of
2x the weight of the unit.
Raising the heat pump off the floor a few inches is
generally a good practice since this will prevent unnecessary
rusting of the bottom panel of the unit. We recommend that the
heat pump be placed on a piece of 2'' Styrofoam covered with
1/4'' plywood. The Styrofoam will smooth out any irregularities in
the cement floor while the plywood will distribute the weight of
the unit evenly over the Styrofoam. This process will also
deaden the compressor noise emitted from the bottom of the
cabinet.
ELECTRICAL PROVISIONS
The heat pump has a concentric 1.093” / 0.875” knockout
for power supply connection to the electrical box. There are
also two other 0.875” knockouts: one for connections to the in-
door circulator; the other for connections to the circulator pump
module for ground loop applications. There are three 1/2” open-
ings with plastic grommets (grommet hole is 3/8”) in the upper
section of the electrical box for connections to the controls.
A schematic diagram and electrical box layout diagram
TABLE 1 - Power Supply Connections
Line Description Voltages
L1 Line 1 All
L2 Line 2 All
L3 Line 3
208-3-60, 460-3-60, 575-3-60
380-3-50
N** Neutral 208/230-1-60, 208-3-60, 380-3-50
** Only required if connecting 115VAC circulators to the heat
pump for 208/230-1-60 and 208-3-60 models, the heat pump
itself does not require a neutral. Required for 380-3-50 models.
CONTROL TRANSFORMER
The low voltage controls are powered by a 100VA class II
transformer. The transformer has a resettable breaker on the
secondary side for circuit protection. Should the breaker trip,
locate and correct the problem and then reset the breaker by
pressing in on it. 460/575-3-60 models as well as all 50 Hz
models have a 100VA transformer with primary and secondary
fuses instead of resettable breaker for circuit protection.
IMPORTANT NOTE: For 208/230VAC-1-60 units, if connect-
ing to 208VAC power supply move the red wire connected
to the 240 terminal of the transformer to the 208 terminal of
the transformer.
TABLE 2 - Control Transformer
Voltage Low Voltage Circuit Protection
(1) 208/230-1-60 Resettable breaker on transformer
(2) 208-3-60 Resettable breaker on transformer
(4) 460-3-60 Primary / Secondary fuses
(6) 220-1-50 Primary / Secondary fuses
(7) 380-3-50 Primary / Secondary fuses
IMPORTANT NOTE: For 208/230VAC-1-60 units, if
connecting to 208VAC power supply move the red
wire connected to the 240 terminal of the transformer
to the 208 terminal of the transformer.
!