Daikin MPS015 F Installation And Maintenance Manual page 26

Electrical
The Daikin burner receives its electrical power from the main
unit control panel. No additional power wiring must be routed
to the burner. The sequencing of the burner is also controlled
through this panel and therefore is factory wired. No additional
wiring will be required.
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
injury, or loss of life.
A. This appliance does not have a pilot. It is equipped with
an ignition device which automatically lights the burner. Do
not try to light the burner by hand.
B. Before operating, smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
What to do if you smell gas:
• Do not try to light any appliance.
• Do not touch any electric switch, do not
use any phone in your building.
• Immediately call your gas supplier from a
phone in a neighboring building. Follow
the gas supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand,
don't try to repair it, call a qualified service technician.
Force or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect
the appliance and to replace any part of the control system
and any gas control which has been under water.
Gas Pressure Requirements
The pressure furnished to the main gas valve must not exceed
13.9" wc. When the supply pressure is above 13.9" wc, a
high pressure regulator must precede the appliance gas
pressure regulator. The inlet gas pressure must not exceed the
maximum pressure rating of the high pressure regulator, and
the outlet pressure must furnish gas to the appliance pressure
regulator within the pressure range mentioned above.
IM 1058-8 • MAVERICK II ROOFTOP SYSTEMS
DANGER
Gas Piping
Gas piping must be sized to provide the minimum required
pressure at the burner when the burner is operating at
maximum input. Consult your local utility on any questions on
gas pressure available, allowing piping pressure drops, and
local piping requirements.
Install all piping in accordance with the
(ANSI Z223.1), (NFPA 54-1999) and any applicable local codes.
The weight of the field-supplied gas pipe must be supported by
field-installed brackets or hangers.
The proper size piping must be run from the meter to the
gas burner without reductions. Undersized piping will result
in inadequate pressure at the burner. The pressure will be at
its lowest when it is needed the most, at times of maximum
demand. Therefore, it can cause intermittent hard-to-find
problems because the problem may have left before the
service technician has arrived. Avoid the use of bushings
wherever possible.
Remove all burrs and obstructions from pipe. Do not bend
pipe; use elbows or other pipe fittings to properly locate pipe.
A drip leg and a manual shut-off must be installed in the vertical
line before each burner such that it will not freeze. Install unions
so gas train components can be removed for service. All pipe
threads must have a pipe dope which is resistant to the action of
LP gas. After installation, pressurize the piping as required and
test all joints for tightness with a rich soap solution. Any bubbling
is considered a leak and must be eliminated. Do not use a
match or flame to locate leaks.
Gas Piping Routing Into Unit
On-The-Roof Piping
1. Remove knockout on upright (refer to
2. Route gas supply pipe through hole. Carefully plan pipe
route and fitting locations to avoid interference with
swinging of doors, etc.
Figure 23: Piping Schematic
26
Optional Gas Heat
National Fuel Gas Code
Figure 23).
Field Gas Piping
7.0" (177.8)
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