AERCO KC1000 Low NOx Water Heater July 2011 - Manual (Page 12)

INSTALLATION
2-4
A 1” drain valve assembly is furnished with each
unit. The drain valve assembly should be in-
stalled as shown in Figure 2.5. and hard piped to
a suitable drain.
2.3.5 SYSTEM RECIRCULATION
The system recirculating line ties into the unit at
the recirculating tee fitting provided in the drain
valve assembly (Figure 2.5). Shut off valves and
union connections are recommended for main-
tenance. Recirculation flow rates must be kept to
8 gpm or less. In a multiple unit installation, each
unit must be tied into the system recirculation
system.
Figure 2.5
Pressure/Temperature Relief and Drain
Valve Installation Location
2.3.6 CONDENSATE PIPING
The KC Heater is designed to condense.
Therefore, the installation site must include
suitable provisions for condensate drainage or
collection. A stainless steel condensate cup is
separately packed within unit’s shipping con-
tainer. To install the condensate cup, proceed as
follows:
1. Remove the left side panel and only the left
half of the rear cover to provide access to the
exhaust manifold and burner (Figure 2.6).
2. Insert the 1-3/4 inch manifold drain hose into
the condensate cup. Allow the cup to rest on
the floor directly beneath the manifold drain
hole (Figure 2.6).
3. Attach a length of 3/4 inch I.D. polypropylene
tubing to the condensate cup drain tube and
route it to a floor drain. . If a floor drain is not
available, a condensate pump can be used to
remove the condensate to drain. The
condensate drain line must be removable for
routine main-tenance. Therefore, DO NOT
hard-pipe.
4. Replace the rear cover and side panel on the
unit.
TEMPERATURE SENSOR
EXHAUST
MANIFOLD
CONDENSATE
DRAIN
BURNER
HOSE CLAMP
1-3/4" O.D. x 8-1 /2 “ LG.
SILICONE HOSE
5/8" O.D. TUBE CONN.
CONDENSATE CUP
PLACED ON FLOOR
Figure 2.6
Condensate Drain Assembly Location
2.4 GAS SUPPLY PIPING
AERCO Gas Fired Equipment Gas Components
and Supply Design Guide (GF-1030) should be
consulted before any gas piping is designed or
started.
WARNING !
DO NOT USE MATCHES, CANDLES,
FLAMES OR OTHER SOURCES OF
IGNITION TO CHECK FOR GAS LEAKS .
CAUTION !
Many soaps used for gas pipe leak testing
are corrosive to metals. The piping must be
rinsed thoroughly with clean water after leak
checks have been completed .
NOTE:
All gas piping must be arranged so that it does
not interfere with the removal of any cover,
inhibit service, maintenance, or prevent access
between the unit and walls, or another unit .