Lochinvar ArmorX2 1.5 - Manual (Page 36)

2
Maintenance
The water heater contains ceramic fiber
materials. Use care when handling
these materials per instructions on page
3 of this manual. Failure to comply
could result in severe personal injury.
ƽ WARNING
Cleaning water heater heat
exchanger
For recommended materials; including brush, appropriate
extension(s), refractory cover, and detailed instructions
see Table 2B - Heat Exchanger Cleaning Kits.
1. Shut down water heater:
• Follow the “To Turn Off Gas to Appliance” instructions
for the heater in the Armor X2 Installation and
Operation Manual.
• Do not drain the heater unless it will be exposed to
freezing temperatures.
2. Allow time for the heater to cool to room temperature
if it has been firing.
3. Remove the nuts securing the heat exchanger access
cover to the heat exchanger and set aside.
4. Remove the heat exchanger access cover, burner, and
gas/air arm assembly.
Table 2B Heat Exchanger Cleaning Kits
Model
Number
Kit
Number
Part
Number
Component
Description
AW 1.0 - 1.5 KIT30064
MSC20083* Nylon 4” Wheel Brush*
MSC20085 1/4” x 12” Drill Extension
MSC20086 1/4” x 24” Drill Extension
* Do NOT use a metal brush. Only use
the kit provided brush or an equivalent
replacement nylon brush. ƽ CAUTION
Service Manual
5. Remove the condensate hose from the heat exchanger
end. Connect a field supplied 3/4” diameter hose to
a drain pan. Using field supplied means, cover the
refractory in the back of the combustion chamber of
the heat exchanger.
6. Use a vacuum cleaner to remove any accumulation on
the heating surfaces. Do not use any solvent.
7. Brush the heat exchanger while dry using a nylon
bristle brush. Caution: DO NOT use a metal brush.
Re-vacuum the heat exchanger.
8. Finish cleaning using a clean cloth dampened with
warm water. Rinse out debris with a low pressure
water supply.
9. Allow the heat exchanger to thoroughly dry.
10. Remove the field supplied rear refractory cover from
the back of the combustion chamber of the heat
exchanger and reassemble.
11. Close isolation valves on piping to isolate water heater
from system. Attach a hose to the water heater drain
and flush water heater thoroughly with clean water by
using purging valves to allow water to flow through
the water make-up line to the water heater.
12. Perform start-up and check-out procedures in the
Check Flame and Combustion Section of the Armor
X2 Installation and Operation Manual.
13. Replace the access cover and restore water heater to
operation.
Check Delta T
1. Check the Delta T using Table 2C as a reference.
Table 2C Water Heater Pump Applications / Recommended
Temperature Rise
36
Water Heater Pump Applications
Model
*Pipe
Size Pump
Make
Pump
Model
**Flow
Rate
(GPM)
Loss
(FT/
HD)
Temp.
Rise
Inlet Outlet
1.0 2" 3" Armstrong E22 100 26 22°F
1.3 2" 3" Grundfos TP 40-160 125 32 22°F
1.5 2" 3" Grundfos TP 40-160 130 31 24°F
Oiled bearing circulators
1. The circulator shipped with the Armor water heater is water-
lubricated. No oiling is required.
2. Check other circulators in the system. Oil any circulators
requiring oil, following circulator manufacturer’s instructions.
Over-oiling will damage the circulator.
*Note: Pump sizing and flow requirements are based on 45 feet of
piping, 4 - 90° elbows, and 2 - fully ported ball valves.
**Note: This appliance is shipped with two pumps to meet the fl ow
requirements listed above.