MASCOT MSTWW, Installation And Operation Instructions Manual

Page: 60 / 68

LAARS Heating Systems
Page 58
9.1 Quick View
Before Installing
- Make sure that there is enough space for installing
Water and gas line.
Verify vent/air termination is located as required.
- All models need for propane Conversion which
requires a separate gas conversion manual.
Install Water Piping
- Water Heater loop piping must be sized to the
minimums listed in the Water Heater manual. Using
smaller piping will cause performance problems.
(Page 32)
Install Vent & Air Piping
- Slide the air inlet pipe and vent pipe into the Water
Heater pipe connector.
- Make sure the terminations are placed as required
in the manual and that air intakes are at least 12
inches above normal snow line.
- Refer to the material check list in this guide for a
list of items needed.
Install Condensate Piping / Tubing &
Components
- Fill out the material check list in this guide to
ensure you have the tubing or PVC pipe and all
components needed for the condensate piping.
- Connect internal components that are supplied
with the Water Heater.
Install Gas Piping
- Install a union and shutoff valve.
Wire the Water Heater
- Connect power wiring and control wiring per water
heater manual wiring diagram.(Section 5.17)
Start up, Adjust & Test
- Follow the Water Heater manual instructions to
clean the system if needed, then fill and check
water chemistry.
9.2 Final check lists
Final check : Installation Conditions.
• Is the Water Heater properly mounted on the wall?
• Is there space for a drain which is close to the
Water Heater?
• Are there any combustible materials near the
Water Heater and vent pipe?
• Is the air supply sufficient for proper operation of
the Water Heater?
• Are the proper service clearances maintained?
• Is the distance between the Water Heater and
point of vent termination minimized?
• Is the proper distance from windows, doors, and
other intake vents maintained?
Final check : Gas pipe installation
• Is the gas supply line equipped with a manual shut
off valve?
• Is the gas supply line a minimum of 3/4˝ inner
diameter?
• Is the gas supply line length and diameter
adequacy to deliver the required BTU’s?
• Has the gas supply line pressure been measured?
• Does the supply gas type match the type indicated
on the water heater rating plate?
Final check: Air/Vent pipe installation
• Has the Water Heater been vented with 3˝ or 2”
PVC, CPVC, Polypropylene or BH Special
Gas Vent (S636 PVC, CPVC) for Category IV
appliances in accordance with this manual and/or
your local code?
• Is the vent termination at least 12˝ above the
exterior grade?
• Is the total vent length within the maximum vent
length restriction?
• Have you checked the air/vent piping for leaks?
• Have you properly supported the vent termination?
• Are all vent runs properly supported?
• Is the vent sloped upward toward the vent
termination at a rate of 1/4˝ per foot (2% grade)?
Final check : Condensate drain installation
• Have you installed a condensate drain line from
the Water Heater to a drain or laundry tub?
Final check : Setting the DIP switches
• Are all DIP switches correctly set on the main board?
Section 9 – Installation Check