OMEGA | WATER SOURCE HEAT PUMPS
OMEGA-VSHP.G-IOM-2205
8
operating efficiency.
Operation of riser loop temperatures above 110
o
F EWT
is not permitted. Elevated risers loop temperatures may
cause nuisance alarm trips. Refer to ‘Unit Operation
Limits”.
Heating Season
In heating mode riser loop temperatures must be main-
tained within 55
o
F to 90
o
F for standard range operation.
For Low Temperature Water (LTW) operation, riser loop
temperature are permitted down to 45
o
F EWT with water
only lopp systems. In Geothermal Range operation, be-
low 45
o
F EWT, the system loop must contain an appro-
priate glycol mixture for loop systems to protect the sys-
tem from freezing the water circuit. For Geothermal op-
eration units must come with factory Geothermal Range
option. Do not operate riser system below 20
o
F EWT.
Operating Limits
Design limits can not be combined. Combin-
ing maximum or minimum limits is not al-
lowed. This could exceed the operation and
design limits of the unit.
For example: It is not allowed to combine
maximum entering air temperature (EAT) limits with
maximum entering fluid temperature (EFT) limits.
6. CHASSIS INSTALLATION
Do not apply plumbers putty, pipe dope or
sealing tape to NPSM water fittings.
Always use a back-up wrench when tightening
hoses or fittings. Damage to copper pipes and
solder joints could result in serious equipment
and property damage.
Check hoses and fittings for any visible dam-
age or debris.
Remove the chassis top cover panel and inspect the
inside of the chassis unit. Ensure that the water and
refrigerant tubing is free from obvious physical damage
and kinks.
Check that piping does not touch other unit
components and other piping. Internal cop-
per pipes can shift during transport, storage
or installation.
INSTALLATION OF FITTINGS AND HOSES
Upon removal of service cover panel check cabinet inte-
rior for construction debris and dust. Clean out all dust
and debris.
Units with NPSM Riser and Chassis Fittings
Connect the supplied hoses to the Male-NPSM riser
shut-off valves. Do not apply pipe dope or pipe sealant
to NPSM fittings.
Always use a back-up wrench
.
Fin-
ger tighten hose and tighten with back-up wrench
approximately 1/6 turn. DO NOT OVERTIGHTEN
.
Units with NPT Riser and Chassis Fittings
Connect the supplied male-male (NPT/ NPSM) cou-
plings to the Female-NPT supply and return riser shut-
off valves.
Do not apply pipe dope to the NPSM fit-
tings, as these are flare style fittings.
Connect the supplied hoses to the riser shut-off valves.
Always use a back-up wrench
.
DO NOT OVERTIGHT-
EN
.
Step by step instructions when connecting hoses to iso-
lation valves:
1)
Do not use pipe dope or Teflon tape!
Hand
tighten hose to the isolation valve.
2) Use back-up wrench located at the front of the
valve or secure to the middle of the valve
body. Tighten a further 1/6 turn. Approx. 20FT/
LBS of torque.
Heating
DB
WB
DB
Std. Entering Air Temperature (EAT)
75
o
F
63
o
F
68
o
F
Min. Entering Air Temperature (EAT)
65
o
F
55
o
F
50
o
F
Max. Entering Air Temperature (EAT)
85
o
F
71
o
F
80
o
F
Cooling
Heating
Cooling
Heating
Cooling
Heating
Std. Entering Fluid Temperature (EFT)
85
o
F
70
o
F
85
o
F
55
o
F
85
o
F
60
o
F
Min. Entering Fluid Temperature (EFT)
50
o
F
55
o
F
50
o
F
45
o
F
30
o
F
20
o
F
Max. Entering Fluid Temperature (EFT)
110
o
F
90
o
F
110
o
F
90
o
F
110
o
F
90
o
F
Cooling
Air Limits
Standard Range
Low Temp Water Range
Fluid Limits
Geothermal Range
Min. CFM/Ton
300
Min. GPM/Ton
1.5
Design CFM/Ton
400
Design GPM/Ton
3
Max. CFM/Ton
450
Max. GPM/Ton
4
Fluid GPM Limits
CFM Limits