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JOHNSON CONTROLS
FORM 145.05-NOM2 (807)
WATER PIPING
General
Piping must comply with local plumb-
ing codes and ordinances.
Due to the variety of piping practices, it is advisable to
follow the recommendations of local authorities. They
can supply the installer with the proper building and
safety codes required for a safe and proper installation.
The water piping should be installed with a minimum
number of bends and elevation changes for best
performance. Piping should contain:
1. Vibration eliminators to reduce vibration and
noise transmission to the building.
2. Shutoff valves to isolate the unit from the piping
system during unit servicing.
3. Manual or automatic air vent valves at the high
points of the system.
4. Some means of maintaining adequate system
water pressure (e.g., expansion tank or regulating
valve).
5. Temperature and pressure indicators located at
the unit to aid in servicing.
6. Size piping to minimize system pressure drop.
7. All piping must be supported independent of the
unit.
Piping Connections
1. Units may be specifi ed with water and condensate
connections on either the left or right side of the
unit.
2. Field piping connections are made to factory
piping connections located on the unit submit-
tal drawings. The piping connections are run to
the outside of the unit cabinet. Connections are
located behind a factory mounted shipping cover.
All connections are copper sweat connections as
indicated on unit dimensional drawings.
3. Supply and return water connections must be
made at the proper locations as indicated by the
dimensional drawings.
Waterside Piping Arrangements
Install the supply riser and its return in close proximity.
Furnish both with permanent thermometers to check
the waterside balance during start-up and routine
maintenance checks. Include a shutoff/balancing valve
on the entering and leaving waterside pipes, drain tees,
and unions of each unit.
Condensate Drain Connections
The condensate drain connection is 1-1/8” O.D.S.
copper and is located on the same side of the unit as the
condenser water connections. The drain is internally
trapped (no external trap is required). The condensate
line should be pitched away from the unit with a
minimum slope of 1/8” per foot.
Drain pans and the drain traps should be kept clean by
periodic cleaning. A cleanout is provided as standard
in the trap to aid in cleaning.
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Страница 105: ...105 JOHNSON CONTROLS FORM 145 05 NOM2 807 LD13009 8 FIG 11 WIRING DIAGRAM POWER CIRCUIT ...
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Страница 107: ...107 JOHNSON CONTROLS FORM 145 05 NOM2 807 8 FIG 13 WIRING DIAGRAM EXPANSION CONTROL BOARD LD13011 ...