C.4 Electrical; Ventilation - Thermon Cata-Dyne Instructions D'installation Et D'utilisation

Thermostatic temperature controller
Thermocouple assembly
Safety shut-off valve
Cata-DyneTM
heater
Figure 2 – Typical natural gas Cata‑Dyne™ Heater installation
Temperature sensing bulb
Safety shut-off valve
Cata-DyneTM heater
Thermocouple assembly
Electrical junction box
Figure 3 – Typical natural gas installation (MKII model only)
C.4 Electrical
NOTE: Ensure that the heater is not operational in an excessive
vibration environment or premature failure of the heater
may occur.
1. All wiring is to be installed in accordance with the latest
revisions of the Canadian Electrical Code (CEC)/National
Electrical Code (NEC) and any applicable local codes.
2. It is desirable to install an indicating light on all starting
systems. This will reduce the possibility of the power being
left on once the heater is started, which can severely
reduce the lifespan of the heater.
3. Ground connections for 120V and higher voltage heaters
are required as indicated in Figures 4 and 5, page 6.
4. The number of terminals in the junction box can be two
or four depending on the number of elements used in the
fabrication of the heater. All MKII models incorporate a
single element and therefore have only two terminals. The
connection procedure for the different combinations is as
described in Figures 4 and 5, page 6.
CAUTION. Install MKII Series heaters with controls on
sides or bottom of heater ONLY.
CAUTION
6
Temperature sensing bulb
Electrical junction box
Appliance regulator (natural
gas only)
Relief Valve
Service regulator
Shut-off valve
Flo-Dri filter
Shut-off valve
Thermostatic temperature controller
Appliance regulator (natural gas only)
Tee to other heaters
Relief Valve
Service regulator
Flo-Dri filter
Shut-off valve
Shut-off valve
Ensure Bus Bar arrangement
corresponds with diagram
Ground Connection
Figure 4 – Elements in parallel
C.5

Ventilation

1. The catalytic reaction in Cata-Dyne™ heaters occurs
when natural gas or propane reacts with oxygen to
produce water vapor, carbon dioxide and infrared energy.
Ventilation must be provided to allow adequate supply of
oxygen for the reaction.
2. For every 1.0 ft2 (0.093 m²) of heater surface, 50 ft³/
hr (1.42 m³/hr) of air supply is required. For example, a
WX 24 x 24 heater (20,000 Btu/hr / 5.857 kW) would require
200 ft³/hr (5.66 m³/hr) of air to ensure proper operation
of the Cata-Dyne™ heater. See Table 11, page 6 for air
requirements.
3. To reduce the carbon dioxide and water vapor
concentrations in the building, a vent hood assembly can
be installed to provide positive ventilation from the heater
(Figure 6, page 6).
3" Elbow 3" Elbow
15" approx.
15" approx.
Vent hood
Heater
11.5"
Dependant upon
application
Figure 6 – Ventilation from heater
Table 11 – Ventilation from heater
Cu. Ft/hr of air per
Heater Series Square Ft of Heater
Surface
WX/MKII (CSA/FM) 50
BX (CSA) 50
BX (FM) 60
WXS (FM) 70
Ensure Bus Bar arrangement
corresponds with diagram
Ground Connection
Figure 5 – Elements in series
3" Snow cap
3" Snow cap
3" Pipe
3" Pipe
3" Flashing
3" Flashing
Wall mounting bracket
Wall
11.5"
Cu. M of air per Square
Meter of Heater
surface
15.3
15.3
18.3
21.3