50
The water-cooled only units have water
supply to the bottom of the heat exchanger
and the return to the top.
Figure 22 - Water-Cooled Only Water
Piping
Condenser water connections range in size
from 1”-3” OD copper or grooved black
pipe. Only use approved water pipe material.
Avoid using galvanized material for water
lines/fittings as the material is corrosive and
may cause fouling of the water system.
Table 4 - Standard Water-Source
Connections
Tonnage
Supply and Return
Connection Size
003, 004
1" CU FPT
005
1-1/4" CU FPT
006, 007, 008,
010, 011, 013
1-1/2" SCH 40
grooved black pipe
015, 016, 018,
020
2" SCH 40
grooved black pipe
025, 030, 040,
050
2-1/2" SCH 40
grooved black pipe
060, 070
3" SCH 40
grooved black pipe
Condenser water pump must be field sized
and installed between the cooling tower and
self-contained unit. System should be sized
in accordance with the ASHRAE Handbook.
Use engineering guidelines to maintain
equal distances for supply and return piping
and limit bend radiuses to maintain balance
in the system. Balancing valves, permanent
thermometers and gauges may be required.
WATER PRESSURE
Prior to connection of condensing
water supply, verify water pressure is
less than maximum pressure shown
on unit nameplate. To prevent injury
or death due to instantaneous
release of high pressure water, relief
valves should be field supplied on
water
piping.
Supply
water
connection may require a backflow
preventer to prevent supply makeup
water from backing up into the public
water system.
WARNING
PVC (Polyvinyl Chloride) and CPVC
(Chlorinated Polyvinyl Chloride) are
vulnerable to attack by certain
chemicals. Polyolester (POE) oils
used
with
R-410A
and
other
refrigerants, even in trace amounts,
in a PVC or CPVC piping system will
result in stress cracking of the piping
and fittings and complete piping
system failure.
CAUTION
Installing Contractor is responsible
for proper sealing of the water piping
entries into the unit. Failure to seal
the entries may result in damage to
the unit and property.
CAUTION
Summary of Contents for M2 Series
Page 2: ......
Page 5: ...5 Split System Piping Diagrams 98 M2 Series Startup Form 115 Maintenance Log 121 ...
Page 35: ...35 Table 1 Electric and Gas Heating Capacities ...
Page 38: ...38 Figure 5 M2 Series Unit Four Point Lifting ...
Page 39: ...39 Figure 6 M2 Series Unit Eight Point Lifting ...
Page 58: ...58 Figure 32 Supply Fan Banding ...
Page 95: ...95 Figure 52 Filter Layout Viewed from the Upstream Side of the Cooling Coil ...
Page 98: ...98 Split System Piping Diagrams Figure 53 A C Split System Piping Suction Down ...
Page 99: ...99 Figure 54 A C Split System Piping Suction Up ...
Page 100: ...100 Figure 55 A C with LAC Split System Piping Suction Up ...
Page 101: ...101 Figure 56 A C with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 102: ...102 Figure 57 A C with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 103: ...103 Figure 58 A C with Hot Gas Bypass Split System Piping Suction Down ...
Page 104: ...104 Figure 59 A C with Hot Gas Bypass Split System Piping Suction Up ...
Page 107: ...107 Figure 62 Heat Pump Split System Piping Suction Down ...
Page 108: ...108 Figure 63 Heat Pump Split System Piping Suction Up ...
Page 109: ...109 Figure 64 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 110: ...110 Figure 65 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 111: ...111 Figure 66 Heat Pump with Hot Gas Bypass Split System Piping Suction Down ...
Page 112: ...112 Figure 67 Heat Pump with Hot Gas Bypass Split System Piping Suction Up ...