Mechanical Installation
www.DaikinApplied.com 23
IM 991-2 • MAVERICK II ROOFTOP
Gas Piping
See the “Installation” section of the gas-fired furnace
installation manual,
or
Hot Water Coil Piping
CAUTION
Coil freeze possible. Can damage equipment. Follow instructions for mixing
antifreeze solution used. Some products have higher freezing points in their
natural state than when mixed with water. The freezing of coils is not the
responsibility of Daikin Applied. Refer to
“Winterizing Water Coils” on page
.
Hot water coils are provided without valves for field piping or
piped with three-way valves and actuator motors.
Hot water coils are not normally recommended for use with
entering air temperatures below 40°F (4°C). No control system
can guarantee a 100% safeguard against coil freeze-up. Glycol
solutions or brines are the only freeze-safe media for operation
of water coils at low entering air temperature conditions.
When no factory piping or valve is included, the coil
connections are 1-5/8" ODM copper.
Refer to the certified drawings for the recommended piping
entrance locations. Seal all piping penetrations to prevent air
and water leakage.
NOTE:
All coils have vents and drains factory installed.
With the factory piping and valve package, field piping
connections are the same NPT size as the valve with
female threading (see
).
Factory-installed water valves and piping are bronze,
brass, and copper. Dissimilar metals within the
plumbing system can cause galvanic corrosion. To
avoid corrosion, provide proper di-electric fittings as
well as appropriate water treatment.
Figure 25: Hot Water Heat Section
(Shown with Factory Valve and Piping)
Figure 26: Hot Water Valve Package
