MAX300-RTG : Hardware Manual Hardware Maintenance
81
In some installations it may desirable to duct the hot air conditioner
condenser exhaust through the wall of the analyzer house. Here are the
requirements for ducting:
Minimum duct diameter – 7 inches (18 cm)
Maximum duct length – 20 feet (6 m)
Duct material – smooth wall, rigid
Elbows – maximum of two 90 degree elbows
Exhaust termination – free area equal to cross section area of duct
Valve Box Heater (optional)
A heated valve box is optional on units with rotary valve inlets. This heater is
power limited and is suitable for use in the hazardous locations for which the unit
is designed. There are both T4 and T3 versions available. No regular heater
maintenance is required. The heaters need no regular maintenance, but if the
valve box is opened, ensure that the heater fins are free of dirt and debris.
The standard T4 heater option achieves an approximate temperature of 60°C
within the valve box. The high temperature T4 heater option achieves an
approximate temperature of 90°C within the valve box. The T3 heater option
achieves an approximate temperature of 110°C within the valve box.
See figures below.
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