John Wood Commercial - 300-400K BTU - Manual (Page 16)

16
condensate drain
The water heaters covered in this manual are condensing
appliances and require a building drain to be located in close
proximity to allow the condensate to drain safely.
Condensate drains from the water heater at the exhaust elbow
located at the bottom. The field installed condensate drain line
must not be elevated above the condensate drain connection
on the condensate trap, see Figure 9. If the condensate does
not drain properly it will build up in the exhaust (vent) elbow.
This will restrict the flow of flue gases and cause the blocked
Exhaust pressure switch to open its contacts. The control system
monitors all pressure switches, if the blocked Exhaust Switch
contacts are open the control system will lock out and disable
heating operation. The “blocked Exhaust” Fault message will be
displayed on the control system’s LCD, see
note:
If the “blocked Exhaust “ Fault message is ever displayed
on the control system LCD, check the condensate drain first and
ensure it is not blocked.
CONDENSATE DRAIN
LINE - FIELD INSTALLED
CONDENSATE DRAIN
LINE CONNECTION
EXHAUST (VENT)
ELBOW
BUILDING
DRAIN
FACTORY INSTALLED
CONDENSATE TRAP
CLEANOUT
PLUG IS
REMOVED
TO CLEAR
DRAIN
figure 9
condensate drain water trap
Ensure a functioning water trap is
installed in the condensate drain.
Gas and carbon monoxide detectors
are available.
Install water heater in accordance with
the instruction manual.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Breathing Hazard - Carbon Monoxide Gas
Do not remove the factory installed condensate trap for any
reason, see Figure 9. The water heater’s vent pipe is under
a slight positive pressure. The water trap prevents flue gases
from escaping into the installed space. See Condensate Drain
Installation on page 35.
condensate ph leVel
The condensate drains from the water heater’s covered in
this manual have PH levels between 4.3 and 5.0. Install a
commercially available neutralizing kit if required by local codes.
note:
Note: Lower PH levels are acidic. Do not connect a metal
drain line, such as copper, to the water heater for this reason.
See Condensate Drain Installation on page 35.
combustible material storage
Fire or Explosion Hazard
Read instruction manual before
installing, using or servicing
water heater.
Avoid all ignition sources if you smell gas.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Use only the gas shown on the water heater rating label.
Keep ignition sources away from faucets after extended
periods of non-use.
Maintain required clearances to combustibles.
Do not expose water heater controls to excessive gas
pressure.
keep appliance area clear and free of combustible materials,
gasoline and other flammable vapors and liquids.
contaminated air
Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Corrosion of the flue ways and vent system may occur if air for
combustion contains certain chemical vapors. Such corrosion
may result in failure and risk of asphyxiation.
Combustion air that is contaminated can greatly diminish the
life span of the water heater and water heater components
such as hot surface igniters and burners. Propellants of aerosol
sprays, beauty shop supplies, water softener chemicals and
chemicals used in dry cleaning processes that are present in the
combustion, ventilation or ambient air can cause such damage.
Do not store products of this sort near the water heater. Air which
is brought in contact with the water heater should not contain any
of these chemicals. If necessary, uncontaminated air should be
obtained from remote or outdoor sources. The limited warranty
is voided when failure of water heater is due to a corrosive
atmosphere. (See limited warranty for complete terms and
conditions).
If the water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater(s) be
installed in a Direct Vent configuration so that all air for combustion
is derived directly from the outdoor atmosphere through a sealed
intake air pipe. See Venting Installation on page 20.