Johnson Controls
17
ForM Et115.24-noM5 (908)
WATER SYSTEM BALANCING
A complete knowledge of the hydronic system, its
components, and controls is essential to proper water
system balancing and this procedure should not be
attempted by unqualified personnel. The system must
be complete and all components must be in operating
condition BEFORE beginning water system balancing
operations.
Each hydronic system has different operating
characteristics depending on the devices and controls
in the system. The actual balancing technique may vary
from one system to another.
After the proper system operation is established, the
appropriate system operating conditions such as various
water temperatures and flow rates should be recorded
in a convenient place for future reference.
Before and during water system balancing, conditions
may exist which can result in noticeable water
noise or undesired valve operation due to incorrect
system pressures. After the entire system is balanced,
these conditions will not exist on properly designed
systems.
CONTROLS OPERATION
Before proper control operation can be verified all other
systems must be in proper operation. The correct water
and air temperatures must be present for the control
function being tested. Some controls and features are
designed to not operate under certain conditions.
A wide range of controls and electrical options and
accessories may be used with the equipment covered
in this manual. Consult the approved unit submittals,
order acknowledgement, and other manuals for detailed
information regarding each individual unit and its
controls. Since controls and features may vary from
one unit to another, care should be taken to identify
the controls to be used on each unit and their proper
control sequence. Information provided by component
manufacturers regarding installation, operation, and
maintenance of their individual controls is available
upon request.
MOTOR AND FAN DATA
UNIT
SIZE
FAN
SPEED
MOTOR
H.P.
# OF
FANS
115 VOLTS
208/230 VOLTS
277 VOLTS
AMPS
WATTS
AMPS
WATTS
AMPS
WATTS
20
high
(1) 1/30
1
0.8
57
0.6
77
0.3
71
Medium
(1) 1/50
0.4
39
0.3
49
0.3
48
low
(1) 1/60
0.3
33
0.3
43
0.3
41
25
high
(1) 1/15
1
1.0
125
0.5
120
0.5
120
Medium
(1) 1/30
0.9
90
0.3
80
0.3
80
low
(1) 1/60
0.5
60
0.2
60
0.2
60
30
high
(1) 1/10
2
1.9
165
0.8
158
0.8
162
Medium
(1) 1/30
0.8
76
0.3
75
0.5
65
low
(1) 1/60
0.5
47
0.2
54
0.4
41
40
high
(1) 1/6
2
2.5
261
1.4
284
1.0
254
Medium
(1) 1/12
1.5
162
0.5
171
0.5
152
low
(1) 1/40
0.6
75
0.4
79
0.3
74
50
high
(1) 1/8
3
1.6
215
0.9
216
0.8
214
(1) 1/6
2.5
257
1.4
233
1.0
255
Medium
(1) 1/15
1.3
145
0.6
109
0.5
132
(1) 1/12
1.5
156
0.5
106
0.5
151
low
(1) 1/40
0.8
69
0.3
63
0.3
86
(1) 1/40
0.6
75
0.4
62
0.3
84
60
high
(2) 1/6
4
5.0
522
2.8
568
2.0
508
Medium
(2) 1/12
3.0
324
1.0
342
1.0
304
low
(2) 1/40
1.2
150
0.6
158
0.6
148
notEs:
1. Motor electrical data is nameplate data. Actual data will vary with application.
2. 230 volt motor is nameplated for 208/230/1/60. Use 230 volt motor data for 208 volt applications.
3. Unit size 30, 208/230 and 277 volt motors are 1/12 hP at high tap.
