MASCOT MSTWW, Инструкция по установке и эксплуатации

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Mascot ST Tankless Water Heater Page 35
4.18 DIP Switches
There is one set of DIP switches.
DIP switches 6 and 7 must be set to OFF when operating the water heater normally.
Shown in it’s actual
orientation in the unit.
Maximum flame detecting voltage 2.4V
Pre-purge time (Tp) Maximum 10s, minimum 1s
Safety Time (igniting time) (Ts) 3.5s
Igniting interval time <10s
Post-purge time (Tip) 180s
Over-heating 1,2,3 protection detection time <1s
Temperature sensor fault detection time <2s
Nr. of trial for ignition (Ntl) 10
DHW water SET temperature range 35°C~ maximum DHW setpoint temperature(default: 60°C)
DHW water OFF temperature DHW target tempe DHW differential temperature(15°C)
DHW water ON temperature Below DHW target tempe3°C
DHW water ON minimum water flow 2ℓ(12Hz)
DHW water OFF minimum water flow 1.5ℓ(8Hz)
Table 14. System Control Settings
Customer Service and Product Support:
800.900.9276 • Fax 800.559.1583
Headquarters:
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
Litho in U.S.A. © Laars Heating Systems 1503 Document 4286
800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355
(Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Document 4286
M
ascot ST Gas Conversion Kit
pg 3 of 4
Table B DIP Switch Settings
Figure D
15.
Turn ON the GAS and WATER supply to the Mascot ST.
NOTE: If your Mascot ST is installed at an altitude greater than 2,000 ft, then the correct altitude setting should have been
set previously and saved within the Control Display. If this has not been done, then Refer to Section 4.12 of the
Mascot ST Install and Operating Manual (document #1316) before continuing with this Gas Conversion.
16.
Per Table B, set DIP Switch
5 to OFF
for LP Propane .
17.
Change dip switches 6 and 7 to a Minimum fi re state (MIN Fire is -
7 ON and 6 OFF
)
18.
Turn
ON
the Mascot ST.
19.
Open the manifold pressure port by loosening the screw two turns as shown in Figure D.
20.
Connect a manometer to the manifold pressure port. For dual port manometers, use the positive pressure side.
21.
While operating the water heater, check CO2 measurement and refer to Table C
22.
Adjust the Cap Screw / Offset Adjustment (See Figure D) until you are within range of Table C.
23.
Turn
OFF
the Mascot ST.
24.
Repeat steps 17 thru 23 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.
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 CO2 as per Table C.
WARNING
ON OFF
#
MIN Fire Normal Operation 7
MAX Fire Normal Operation 6
NG Natural LP Propane 5
Inlet fl ow Over-ride ON Inlet fl ow Over-ride OFF 4
Normal Operation
Do Not Touch
3
Normal Operation
Do Not Touch
2
Normal Operation
Do Not Touch
1
Always make sure that the Control Display is turned OFF
before changing any DIP switch. Then turn Control Display
back ON to continue with CO2 measurements.
DIP Switch Function OFF ON
1-3 Machine power Do NOT Move.
4 OVER-RIDE Inlet DHW Flow Limiter OFF ON
5 Propane or Natural Gas LP NG
6 Max. Normal MAX Fire
7 Min. Normal MIN Fire
Table 15. Dip Switches