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Please note that some municipalities do not allow the use
of a shutoff valve on the effluent/outlet side of any heating
equipment, especially when there is one on the inlet side.
These entities typically instead allow a PVC tee and spring
check valve on the effluent/outlet side. This is allowed
by Raypak and can also double as your protection from
chemical feeders and chlorinators that our downstream of
the unit.
5. Operate the pump and check the system for leaks.
6. Drain plugs are located on each union fitting as shown
in Figure 7 for draining the system during winterizing.
Figure 7.
Water Connections/Drain Plugs
NOTE: While it is possible to mount the upper union
with the drain plug vertically, the manufacturer has
determined that installing both unions with the drain
plugs facing down as shown in Figure 7 provides for the
best draining of the system.
CAUTION: When the drain plugs are removed for
draining the system, ensure that they are stored in a
safe place for re-installation when needed to restart the
system.
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7. PRESSURE DROP
For system pressure drop information, see Table B.
GPM (LPM)
20 (750)
30 (113)
40 (151)
50 (189)
60 (227)
70 (265)
WATER OUT
80 (303)
Note: Multiply the pressure drop in psi by 2.3067 to yield the pressure
drop in Ft. H2O Head (TDH).
Table C.
8. HEATER CONTROL
WATER IN
The heater display is viewable from outside of the
heater. All operation and settings of the heater control
are accomplished through the use of the 3 buttons of the
user interface. These buttons are labeled as follows (see
Figure 8):
•
•
•
Figure 8.
The display shows information on a 2-line, 16-character
backlit Liquid Crystal Display (LCD). The backlight is
normally off. The backlight is on for 15 minutes after
Power-Up and for 15 minutes after any button press. Use
the LCD to setup and monitor the operation of your heater.
Pressure Drop (PSI)
Flow
2450 3450 4450 5450
2.5
3.4
3.4
6
7
7
10
13
13
Pressure Drop Across the Heater
DISPLAY
MENU/SET – Scroll through available menus and set
changed values (MENU)
UP – Increase values in adjustable menus
DOWN – Decrease values in adjustable menus
Heater Control Display
6450/
8450/
6450HC
8450HC
4
6
9
7
9
9
10
10
10
11
11
11
12
12
12
13
13
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