LP-551 Rev. 000 Rel. 021 Date 4.2.21
10
Part 3 - Prepare the VWH
Optional equipment available from HTP (and Part #):
• Wall Mount Bracket (7450P-211)
• System Sensor (7250P-324)
• Indirect Tank Sensor (7250P-325)
• 3” Stainless Steel Vent Termination Kit (V1000)
• 4” Stainless Steel Vent Termination Kit (V2000)
• 6” Stainless Steel Vent Termination Kit (V3000)
• 2” PVC Concentric Vent Kit (KGAVT0501CVT)
• 3” PVC Concentric Vent Kit (KGAVT0601CVT)
• 3” Polypro Vent Kit (8400P-001)
• 3” Polypro Pipe
(33’ length # 8400P-002, 49.5’ length # 8400P-003)
• Low Water Cut-O Kit (7450P-904)
• Manual Reset High Limit (7450P-910)
• Alarm System (to monitor any failure) (7350P-602)
• 928 PC Connection Kit with Software (7450P-330)
• Condensate Neutralizer (220/299/301 Models - 7450P-212, 399
Model - 7350P-611)
• Eighty Gallon Glass-Lined Storage Tank (GL-80)
• Eighty Gallon Stainless Steel Storage Tank (SSU-80CB)
VWH Circulator Kits
• 220 Model - Part # 7450P-248
• 299 / 301 Models - Part # 7450P-249
• 399 Model - Part # 7450P-250
NOTE: When using an optional system sensor, pipe insulation must be
wrapped around it to improve temperature measurement accuracy
and increase overall system eciency.
COLD WEATHER HANDLING - If the VWH has been stored in a very
cold location (BELOW 0
o
F) before installation, handle with care until
the components come to room temperature. Failure to do so could
result in damage to the VWH.
Carefully consider installation when determining VWH location.
Please read the entire manual before attempting installation. Failure
to properly take factors such as VWH venting, piping, condensate
removal, and wiring into account before installation could result in
wasted time, money, and possible property damage and personal
injury.
This VWH is certied for indoor use only. DO NOT INSTALL OUTDOORS.
Outdoor installations ARE NOT covered by warranty. Failure to install
the VWH indoors could result in property damage, severe personal
injury, or death.
A. Locating the VWH
Incorrect ambient conditions can lead to damage to the heating
system and put safe operation at risk. Ensure that the installation
location adheres to the information included in this manual. Failure
to do so could result in property damage, serious personal injury,
or death. Failure of VWH or components due to incorrect operating
conditions IS NOT covered by product warranty.
This VWH must be installed upright in the vertical position as
described in this manual. DO NOT attempt to install this VWH in any
other orientation. Doing so will result in improper VWH operation
and property damage, and could result in serious personal injury
or death.
1. Installation Area (Mechanical Room) Operating Conditions
• Ensure ambient temperatures are higher than 33
o
F / 0.6
o
C
and lower than 104
o
F / 40
o
C
• Prevent the air from becoming contaminated by the
products, places, and conditions listed in this manual
• Avoid continuously high levels of humidity
• Never close existing ventilation openings
• Ensure a minimum 1” clearance around hot water and
exhaust vent pipes
• NOTE: To prevent condensing in the fan, it is recommended
to avoid prolonged exposure to temperatures below 45
o
F
2. Check for nearby connections to:
• System water piping
• Venting connections
• Gas supply piping
• Electrical power
• Condensate drain
3. Check area around VWH. Remove any combustible materials,
gasoline, and other ammable liquids.
Failure to keep the VWH area clear and free of combustible
materials, liquids, and vapors can result in substantial property
damage, severe personal injury, or death.
C. Optional Equipment
Condensate Flue Check System
The check system prevents heat exchanger exhaust from backing up
into the cabinet.
Pump Service Mode
Allows manual operation of pumps to commission system and check
pump operation.
This VWH is heavy. Take precautions when moving the VWH into
its installation location to avoid tipping, bumping, or dropping it.
Failure to take such precautions may result in property damage,
severe personal injury, or death.
This VWH has a condensate disposal system that may freeze if
exposed to sustained temperatures below 32
o
F. Precautions
should be taken to protect the condensate trap and drain lines
from sustained freezing conditions. Failure to take precautions
could result in property damage, severe personal injury, or death.
Do not connect the VWH to any heating systems or components
that have been previously used for non-potable applications.
Do not introduce toxic chemicals, such as antifreeze or VWH
treatments, into the VWH or any piping meant for potable water
purposes.
Ensure that all piping and components connected to the VWH are
suitable for potable water applications.
Do not use this VWH for space heating applications.
Circulators suitable for DHW applications must be used.
Failure to follow these instructions could result in serious personal
injury or death.
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