IBC INTERGAS SFT 199 User Manual

INSTALLATION AND OPERATION INSTRUCTIONS
3-4
SFT 199 TANKLESS WATER HEATER
INSTALLATION AND OPERATION INSTRUCTIONS
3-4
SFT 199 TANKLESS WATER HEATER
3.4 FUEL CONVERSION
The SFT series modulating water heater is factory  re-tested to operate with
natural gas. The rating plate is marked to indicate which fuel the particular unit
has been set up with. Firing a unit with a fuel other than what is listed on the
rating plate is prohibited unless the following conversion procedure is completed
by a quali ed technician.
Refer to the preceding section 3.3 - COMMISSIONING. The low  re (zero-offset)
valve adjustment cap on the gas valve has been factory set.
Fuel conversion requires hardware adjustments (ori ce replacement) as well as
measurement and possible tuning of the low  re mixture. Detailed instructions
including parts and labeling are found in Fuel Conversion kits. Refer to Table 11
for the correct kit number.
NATURAL GAS PROPANE
CO
2
VALUE (%) AT HIGH FIRE WITH THE FRONT COVER OPEN
Max. CO
2
value 10.1% 11.5%
Min. CO
2
value 9.1% 9.8%
CO
2
VALUE (%) AT LOW FIRE WITH THE FRONT COVER OPEN
Max. CO
2
value = value at High = value at High – 0.3%
Min. CO
2
value 9.1% 9.5%
Table 12: CO
2
Values and High and Low Fire
The following procedure must be carried out by a quali ed technician.
1. Ensure that the gas supply is turned off at the manual gas valve.
2. Disconnect the electrical power.
3. Disconnect the nut at the gas valve outlet (top of the gas valve) and remove
the ori ce and O-ring.
4. Insert the correct ori ce into the O-ring, and re-install into the nut at the gas
valve outlet (top of the gas valve) and then tighten the nut.
5. Restore the gas supply by opening the manual gas valve.
6. Test for leaks by using an approved leak detection solution on all joints.
7. Carefully follow the “Prior to Start-Up” – Section 3.2 and “Commissioning” –
Section 3.3 procedures on the preceeding pages 3-2 and 3-3.
DANGER
Operating any IBC appliance
using a fuel other than the
fuel listed on its rating plate is
prohibited. If the information
in this section related to
conversion to alternative
fuels is not followed exactly,
a dangerous situation can
result, leading to  re or
explosion, which may cause
property damage, personal
injury, or loss of life.
Figure 28: Orifi ce and O-ring
PROPANE ORIFICE CHART
MODEL
NUMBER
ORIFICE
SIZE
SFT-199 535
NATURAL GAS ORIFICE
CHART
MODEL
NUMBER
ORIFICE
SIZE
SFT-199 660
ALTERNATIVE
NATURAL GAS ORIFICES
FOR CALORIFIC VALUES
750–900 BTU/FT
3
MODEL
NUMBER
ORIFICE
SIZE
SFT-199 725
VENTURI
IDENTIFICATION
MODEL
NUMBER
ID NUMBER
SFT-199 375

IBC INTERGAS SFT 199 Specifications

General

Brand	IBC
Model	INTERGAS SFT 199
Category	Water Heater
Language	English