York YHAU-CGH, Installation Operation & Maintenance

Page: 33 / 182

FORM 155.32-ICOM2.EN.UL SECTION 3 - HANDLING, STORAGE, INSTALLATION AND REASSEMBLY
ISSUE DATE:1/10/2018
JOHNSON CONTROLS 33
Figure 12 - Fuel Gas Piping System
The oil return pipe should be connected to the vapor phase part above the service tank, and no shut off valve should be located
on this oil return line. In addition, to prevent aeration into the oil supply (delivery) pipe, the oil return pipe should be set apart
from the delivery line and a baffle plate should be installed on the return pipe. A flow meter should also be installed on the oil
supply (delivery) pipe to the oil service tank.
The scope of supply of delivery is inside the parameters of the unit shown in Figure 12 on page 33 Installation and piping are
outside the scope of supply and should be supplied and prepared by the contractor or customer. See Figure 13 on page 33 t o
plan the fuel supply piping from oil storage tank to chiller-heater.
Figure 13 - Oil System
NOTE:
• Install an oil gauge near the chiller-heater.
• The oil service tank should be installed on the same floor and be level with the chiller-heater.
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LD 27375
Blower
Electric Butterfly Valve
Electrode
for Ignition
Nozzle Tip
Flame
Detector
Protect Relay
(Burner Controller)
Check
Valve
Fuel
Shut-Off
Valve
Oil Regulating Valve Flexible Tube
Flexible Tube
Pre-Heater
Pressure
Gauge
(Return)
Fuel
Shut-Off
Valve Fuel
Shut-Off
Valve Pressure
Gauge
(Discharge)
Fuel
Pump Oil
Oil Filter
Oil Filter
Oil Storage Tank
Oil Feed Pump Oil Filter Flow Meter
Baffle Plate
Air Vent
Pipe
Oil Level
Alarm Device
Oil Level
Control Device
Oil Service
Tank