Aerco INNOVATION INN1060, Руководство пользователя

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Chapter 2
Innovation Series Water Heaters
GF-128
Installation USER MANUAL
OMM-0079_0B
07/21/11 AERCO International, Inc.
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100 Oritani Dr.
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Blauvelt, NY 10913
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Ph: 800-526-0288 Page 17 of 200
NOTE:
The maximum working pressure for installations within the Province of Alberta is 87 psig.
Therefore, a pressure & temperature relief valve with a setting of 75 psig/210°F is
supplied with Alberta shipments. See Drawing AP-A-863 in Appendix E.
2.7 PRESSURE & TEMPERATURE RELIEF VALVE INSTALLATION
An ASME rated Pressure & Temperature (P&T) Relief Valve is supplied with each Innovation Water
Heater. With the exception of Alberta installations (see above Note), the valve setpoint is 150 psig/210°F.
The P&T Relief Valve is installed at the top of the Recirculation Loop Assembly as shown in Figure 2-5. A
suitable pipe joint compound should be used on the threaded connections. Any excess should be wiped
off to avoid getting any into the valve body. The relief valve should be piped to within 12 inches of the
floor to prevent injury in the event of a discharge. The relief piping must be full size, 1-1/2”, without
reduction. No valves, restrictions, or other blockages are allowed in the discharge line. In multiple unit
installations the discharge lines must not be manifolded together. Each must be individually run to a
suitable discharge location.
Figure 2-5. P&T Relief Valve Location
2.8 SYSTEM RECIRCULATION LOOP
The System Recirculation Loop Assembly is located at the rear of the unit as shown in Figure 2-5. This
assembly contains a recirculator pump which connects between the upper hot water outlet and lower cold
water inlet of the unit’s heat exchanger. The purpose of this loop is to provide feed-forward (FFWD)
temperature control by mixing a portion of the hot water outlet with the cold water inlet of the unit.
Temperature sensors located in the hot water outlet and cold water inlet provide temperature data to the
C-More Control System. The Control System utilizes this data to modulate the fire rate (Air/Fuel Valve
position) to precisely maintain the hot water outlet temperature at the selected setpoint temperature.
2.9 CONDENSATE DRAIN & PIPING
The Innovation Water Heater is designed to condense water vapor from the flue products. Therefore, the
installation must have provisions for suitable condensate drainage or collection.
The condensate drain port, is located on the exhaust manifold at the rear of the unit (Figure 2-6). This
drain port must be connected to the Condensate Trap (part no. 24060) which is packed separately within
the unit’s shipping container. The Condensate Trap inlet and outlet connections contain tapped 3/4” NPT
ports.