Installation
WSHP-SVX01L-EN
57
A circuit setter provides a means of manually balancing
the water flow to the heat pump. This manual in-line
balancing method is accurate up to ±20%. In order to
determine flow rate, the user must record both handle
position, and differential pressure drop. Then, the user
must consult a chart containing both pieces of information
and make the necessary adjustments to the circuit setter.
For self balancing flow control, a Hays Measurflo®
balancing hose kit provides a constant flow rate over the
pressure differential range of 2 – 80 psid. As system
pressures change (through the addition of heat pumps, for
example) each individual flow control valve will
automatically adjust to the new system conditions.
Additional accessories, such as a strainer are
recommended for use to eliminate contaminants from
entering the co-axial water-to-refrigerant heat exchanger.
Cleaning and Flushing the Water Loop
After the piping system is complete, the flexible hose
connectors should be doubled back to complete the water
circuit external to the unit (avoiding trash settle-out in the
condenser). An extra pipe may be necessary to connect
the hose kits.
1.
Water circulation system should be filled with clean
water using the water make up connections.
Note:
Air vents should be open during filling.
2. With the air vents closed, start the circulating pump
and then crack the air vents to bleed off the trapped air,
assuring circulation through all components of the
system.
Note:
Make up water must be available to the system to
replace the volume formerly occupied by the air
that is bled off.
3. With the air vented and the water circulating, the entire
system should be checked for leaks with repairs made
as required.
4. Operate the supplementary heat system (boiler)
making checks per manufacturer’s instructions. During
this operation, visual checks should be made for leaks
that may have occurred due to increased heat. Repair
as required.
5. Open the system at the lowest point for the initial blow
down (making sure the make up water is equal to the
water being dumped). Continue blow down until the
water leaving the drain runs clear, but not less than 2
hours.
6. Shut down pumps and supplementary heat system.
Reconnect the hoses placing the water-to-refrigerant
heat exchanger in the water circulating system.
Note:
Vents should be open when the pumps and
supplementary heat system are shut down.
Field Installed Power Wiring
Verify that the power supply available is compatible with
the unit’s nameplate. Use only copper conductors to
connect the power supply to the unit.
Manual balance hose kit
Automatic balance hose kit
A
c
tu
a
tor
Opt
i
on
a
l
Str
ai
ner/
Blowdown V
a
lve
w/Hose Conne
c
tor
V
a
lve Body
B
a
ll V
a
lve w/PT
B
a
ll V
a
lve w/PT
Mesurmeter
w/PT’s
A
c
tu
a
tor
B
a
ll V
a
lve
B
a
ll V
a
lve w/PT
Opt
i
on
a
l
Str
ai
ner/
Blowdown V
a
lve
w/Hose Conne
c
tor
V
a
lve Body
Inl
i
ne Mesur
f
lo
B
a
l
a
n
c
e V
a
lve
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow codes could result in death or serious injury.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of
conductors. Failure to use copper conductors could
result in equipment damage.
Summary of Contents for Axiom EXH018
Page 117: ......
