Installations of Model VR heaters in the United States must be in accordance with the National Fuel Gas Code ANSI Z-223.1 (latest edition) and all local codes. In Canada, installations must be in accordance with the latest edition of CAN/CGA B149.1 and B149.2 and any local authorities having jurisdic- tion. To allow for thermal expansion, Model VR heaters must be suspended with chain and must have flexible gas and electric connections. Chain must have a minimum load-carrying capacity of 200 lbs. Depending on the type of building construction, the installer may either attach the chain support directly to the building or attach and extend a support to the location needed (all chain supporting tube sections must be plumb). SUPERSTRUT® brackets or a comparable metal strut material is well suited as a support structure that requires numerous suspension points. Model VR heaters must be level. The use of turnbuckles is not required but is recommended to assist in leveling the heater. If used, turnbuckles must be of steel or malleable iron. Op- tional chain kits and turnbuckle kits are available from Reznor. Each burner/control box is equipped with a grounded, plug-in
RECOMMENDED MINIMUM MOUNTING HEIGHTS
Model (000 BTUH Input) 75 100 125 150 175 200
3.7 4.0 4.6 4.9 5.2 5.5
10 11 13 14 15 16
3.0 3.4 4.0 4.3 4.6 4.9
9 10 11 13 14 15
2.7 3.0 3.4 4.0 4.3 4.6
electrical cord. Gas connection must be with either an expan- sion coil or an approved stainless steel flexible connector. Optional flexible connectors are available from Reznor. Flex- ible connectors do affect gas pressure. Pressure drops for flexible connectors available from Reznor are listed below. (Re- quired gas pressures found in Technical Data Tables.) Model VR heaters are designed with these installation advan- tages:
GAS PRESSURE DROP ("W.C.) THROUGH 24" STAINLESS STEEL FLEXIBLE CONNECTORS AVAILABLE FROM REZNOR
100 125 150 175 200
13 mm (1/2") I.D.
in. w.c. 0.25 0.25 0.25 0.50 0.75 0.80 0.90 mbar 0.62 0.62 0.62 1.25 1.87 1.99 2.24
19 mm (3/4") I.D.
in. w.c. 0.05 0.05 0.10 0.15 0.20 0.40 0.50 mbar 0.12 0.12 0.25 0.37 0.50 1.00 1.25
Modular turbulator strips with interlocking
connections All tube packages include a field-installed turbulator strip.The turbulator strip is slid into the tube in small, easy-to-handle sections. By interlocking the sections as they are installed, the required number of sections can be slid into the tube creat- ing the full-sized turbulator strip.
Reflectors are required to direct radiant heat. Reflectors, re- flector brackets, and hardware “kits” are included in the tube packages. The reflector retainers extend over the installed reflectors securing the reflector to the tube and act as a hanger connection.
Terminal strip for thermostat connection
The burner/control box is equipped with a terminal strip for connection of a remote thermostat, or the thermostat may be attached to the heater by using an optional thermostat bracket. Up to six heaters may be controlled by one thermostat or time clock by installing a multiple heater control option.
All tubes are joined by a compression coupling. All required parts for each tube connection are shipped in the tube carton.
Step 1 Align tubes and insert into compression coupler.
Step 2 Tighten bolts on compression coupler.
Step 3 Install self-drilling screws in holes provided in coupler opposite the bolts.