Daikin AVS - Water Coil Connections

IM 817-4 Page 17 of 60
For Water Systems
Afterushingpipingadequately,soalldebrisisremoved,llthesystem.
At initial operation, vent manually by unscrewing the vent plug one or
twoturns,gure41.Afterventing,tightentheventplugrmly.
Water system under pressure. Keep face and body parts well
away from vent.
Unscrew the vent plug only one or two complete turns, and vent
slowly. Water pressure can result in severe personal injury.
Use piping shut off valves and connection unions for future
servicing to the coil supply and return stubs, instead of hard
piping. This permits easy removal of the coil or control valve if
servicing is required.
Figure 41 - Vent and Drain Plug
Unscrew the vent plug one
or two turns to manually vent
system.
Figure 38 - Hot Water Coil Connections
Chilled Water Coil
Hot Water Coil
Chilled Water Return
Chilled Water Supply
Hot Water Return
Hot Water Supply
Water Coil Connections
Hook up water piping in accordance with Figure 38 and 39 for hot
water and chilled water coil connections.
Figure 39- Chilled Water Coil Connections
Failure to install water piping to coils properly can result in
improper unit operation and coil freeze-ups.
Figure 40 - Protect Components From Overheating Before Brazing
Use A Quenching Cloth
When Brazing, to Prevent
Overheating The Piping
Components (Avoid Valve
Damage and Erratic
Operation)
Vent
Drain Plug
2-pipe Chilled Water/Hot Water Systems
After making the piping connections, securely attach and insulate the
water-in temperature sensor (S5) to the water coil supply line. The
sensor should be located on the water supply line in an area where
thereis continuous water ow.Thesensor hangs loose inthesame
end compartment as the coil connections. This sensor must be attached
correctly for proper unit operation.
After Brazing
Installprovideddonutshapedinsulationsealsaroundpipettings,by
removing white backing. Press seals up to coil partition to seal gaps
in partition insulation.
Donut insulation seals must be installed for proper air ow
through the coil.
Consider adding
piping unions
for future servicing
(by others)
Consider adding
piping unions
for future servicing
(by others)
Air Flow
Air Flow
CAUTION
NOTICE
CAUTION
WARNING