Lennox ROOFTOP FLEXY FXK 55, Installation, Operating And Maintenance Manual

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WATER CONDENSING
FLEXYII_WSHP-IOM-1307-E - 16 -
WATER LOOP CONFIGURATION (FOR WATER SOURCE HEAT PUMP)
Figures below show the 2 water configurations.
Figure 1 indicates all components used as standard :
•
the electronic water flow switch,
•
the water filter,
•
the pressure taps and drain valves,
•
the automatic airvent,
The second figure shows rooftop water loop with Low Water Loop Temperature option.
L
OW
W
ATER
L
OOP
T
EMPERATURE
(O
PTION
)
In order to operate with low water inlet temperature in cooling mode (ie: ground source water loops) it is necessary to control
the water flow rate in the heat exchanger to maintain a minimum condensing pressure in the refrigeration circuit.
In cooling mode the CLIMATIC 60 will control the water flow rate in the condenser by monitoring the condensing pressure and
by closing the water flow valve accordingly by a 0-10 Volts signal.
This option offers a second opportunity: give the possibility to close the rooftop water loop when compressors are stopped.
Warning: the valve does not allow to do the balance on customer circuit
Several checks have been to do to avoid creating perturbations on customer circuit :
- check valve pressure drop at water flow
-use variable speed pump.
- adjust water flow switch set up at small water flow acceptable by the unit
W
ATER
F
ILTER REPLACEMENT
(
ONLY FOR
W
ATER
S
OURCE
H
EAT
P
UMP
)
It is important that units are serviced regularly by a qualified technician, at least once
every year or every 1000 hours of operation.
1 All Victaulic Connections 5 Pressure Taps and drain Valve
2 Inlet Water Filter 6 Stainless steel Exchanger
3
Automatic Air Vent
7
ElectroValve (HP control option)
4
Electronic Flow Switch
2
1
3
4
5
6
1
2
3
4
5
6
7
Low Water Loop Temperature Option
Hydraulic Data
Standard
Access for cartridge cleaning
Figure 1 Figure 2