Laars MASCOT FT MFTCW Installation And Operation Instructions Manual page 34

Page 32
SECTION 4. Installation
M
ascot FT Gas Conversion Kit
4.13 Natural Gas to Propane Conversion
ON
MIN Fire
MAX Fire
NG Natural
3" Vent Size
Do Not Touch
Do Not Touch
Normal Operation
DIP Switch Settings Table B
WARNING
Always make sure that the Control Display is turned
OFF before changing any DIP switch. Then turn Control
Display back ON to continue with CO 2 measurements.
9.
Turn ON the GAS and WATER supply to the Mascot FT.
10.
Per Table B, set DIP Switch
11.
Per Table B , change dip switches 6 and 7 to a minimum fi re state (MIN Fire)
12.
Turn ON the Mascot FT.
13.
Open the manifold pressure port by loosening the screw two turns as shown in Figure E.
14.
Connect a manometer to the manifold pressure port. For dual port manometers, use the positive pressure side.
15.
While operating the water heater, check CO 2 measurement and refer to Table C
16.
Adjust the Cap Screw / Offset Adjustment (See Figure E) until you are within range of Table C.
17.
Turn OFF the Mascot FT.
18.
Repeat steps 11 thru 17 at MAX FIRE by changing DIP switches 6 and 7. BUT Do NOT ADJUST MAX FIRE.
If the MAX FIRE is too Low, then go back to MIN FIRE and adjust MIN FIRE to come up. Be sure to shut
boiler OFF before moving DIP switches.
If the MAX FIRE is too High, then go back to MIN FIRE and adjust MIN FIRE to come down. Repeat this
process between the MIN FIRE settings and MAX FIRE settings (without adjusting at MAX FIRE) until
both MAX and MIN are within allowable CO 2 as per Table C.
OFF #
7
Normal Operation
6
Normal Operation
5
LP Propane
4
2" Vent Size
Normal Operation
3
Normal Operation
2
Do Not Touch
1
5 to OFF
for LP Propane.
Customer Service and Product Support:
20
Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355
800.900.9276 • Fax 800.559.1583
Headquarters:
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Figure E
www.Laars.com
LAARS Heating Systems
Figure D
800.900.9276 • Fax 800.559.1583
(Customer Service, Service Advisors)
Litho in U.S.A. © Laars Heating Systems 1503 Document 4288
Document 4288
(Applications Engineering)
pg 3 of 4