W A T E R - S O U R C E H E A T P U M P S
JRE-Series
R e v. : A u g u s t 1 9 , 2 0 2 0
I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e
34
Unit Commissioning & Operating Conditions
Commissioning Conditions -
Consult Table 4b
Notes:
1. Conditions on Table 4b are not normal or
continuous operating conditions. Minimum/
Maximum limits are commissioning conditions
to bring the building up to normal occupancy
temperatures. Units are not designed/intended
to operate under these conditions on a regular or
ongoing basis.
2. Voltage utilization range complies with AHRI
Standard 110.
Table 4b: Building Commissioning Limits
Air Temperature Limits
Cooling
Heating
Minimum Entering Air
40
°
F [4.4
°
C]
40
°
F [4
°
C]
Maximum Entering Air db
110
°
F [43
°
C]
80
°
F [27
°
C]
Water Temperature Limits
Cooling
Heating
Minimum Entering Fluid
40
°
F [4
°
C]
20
°
F [-6.7
°
C]
Maximum Entering Fluid
120
°
F [48.9
°
C] 90
°
F [32.2
°
C]
Operating Limits -
Environment - Units are designed for
roof mount or indoor installation.
Power Supply -
A voltage variation of +/- 10% of
nameplate utilization voltage is acceptable.
Determination of operating limits is dependent primarily
on three factors: 1) Return Air Temperature, 2) Entering
Water Temperature, and 3) Ambient Temperature. When
any one of these factors is at minimum or maximum
levels, the other two factors must be at normal levels
to ensure proper unit operation. Extreme variation in
temperature and humidity and/or corrosive water or air
will adversely affect unit performance, reliability, and
service life. Consult Table 4a for operating limits.
Table 4a: Building Operating Limits
Air Temperature Limits
Cooling
Heating
Minimum Entering Air
60
°
F [15.5
°
C]
50
°
F [10
°
C]
Maximum Entering Air db
90
°
F [32.2
°
C]
80
°
F [27
°
C]
Water Temperature Limits
Cooling
Heating
Minimum Entering Fluid
40
°
F [4
°
C]
20
°
F [-6.7
°
C]
Maximum Entering Fluid
120
°
F [48.9
°
C] 90
°
F [32.2
°
C]
