Rapid 2005, Installation, Operation & Service Manual

Page: 90 / 162

B-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
80 of 147
(pilot stays lit d u ring b u rner operation). Models 2020
- 2030 operate w ith interr u pted pilot (pilot t u rns off
after flame is established). The flame sensor
obser
v es main flame only.
Model 2005 u ses a flame rod to detect the flame
(minim u m flame c u rrent 1µA); Models 2010 - 2030
u se an u ltra v iolet (UV) light scanner (5.0 Vdc flame
signal).
If a pilot flame is not present, the electrical signal
cannot be sent and the pilot b
u rner gas v al v e w ill
close. The relay is eq u ipped w ith a 10-second trial for
ignition. If ignition does not occ u r, the flame
safeg u ard relay w ill locko u t, and m u st be man u ally
reset. 2005 w ill reset u pon po w er restoration. (See
the Tro u ble-Shooting G u ide - Page 136, Section 22 )
17.5.5 Dischar g e Temperature Sensor
This de v ice senses the discharge temperat u re of the
air at the blo w er. The discharge temperat u re sensor
reports the discharge temperat u re to the temperat u re
control amplifier w hich mod u lates the b u rner to the
temperat u re set on the remote panel selector. Sho u ld
this system fail, the man u al high temperat u re limit
s w itch w ill t u rn the b u rner off. BMS-ready air
handlers do not come eq u ipped w ith this sensor and
m u st be field-s u pplied.
17.5.6 Positive Low Fire Start
This feat u re forces the b u rner to start in lo w fire
rather than high fire d u ring the air handler’s start- u p
seq u ence of operations. The b u rner maintains its lo w
fire setting for 10 seconds (as per timer setpoint)
before it begins to mod
u late.
FIGURE 3 8 : Wirin g Dia g ram Key
Notes:
1.
Wire Over 24vac To Be A Minimum Of
16 Awg Flexing Type Mtw, 105c, 600v Or Equivalent
Colors 115vac: Phase-red, Neutral-white,
Ground-green
Colors 24vac: Blue
2. Control Wire To Be A Minimum Of 20 Awg Type
Belden 5401fe Cmr 75c Shielded Or Equivalent
3. Power Supply And Motor Wires To Be Sized To Nfpa79,
Latest Edition
Colors All Voltages: Phase(s)-black, Ground-green
Terminals Located In Control Panel Only
Terminals Located In Control Panel And
Connected To The Remote Panel
Terminals Located In Remote Panel Only
Wire(s) Located In Control Panel
Wire(s) Located In Remote Panel
Shielded Wire(s), One End Grounded
M1
CR2
C
No
Nc
Relay / Motor Starter Coil (Associated With M1 Contacts)
Normally Open Contact (Associated With M1 Coil)
Normally Closed Contact (Associated With CR2 Coil)
Air Flow Switch
Indicator Light On Remote Panel
M1
L