Gas-Fired Products PTU Series, PTS Series manual Venting, Carbon Monoxide Hazard

D. LOW VOLTAGE (24V) THERMOSTAT CONNECTIONS – MULTIPLE HEATERS (utilizing a fan center relay)

Ground

NNeutral

L1 Hot (120V)

Fused Disconnect switch

CNO

24V	coil
R
	G

Receptacle

	Continue To
	Additional
	Heaters
Burner Control Box	Power Supply
	Cord (120V)
C	C
TH	TH

Fan Center Relay Part No. 30169000	Low voltage
Contact Rating: 120V, 40VA, 12A
(maximum of 6 heaters per relay)	thermostat (24V)

Jumper factory installed for optional 24V thermostat

16.0) VENTING

CARBON MONOXIDE HAZARD

Heaters installed in an unvented mode require a minimum ventilation flow of 4 CFM per 1,000 Btu/hr of total installed capacity.

In buildings with airborne contamination such as poultry houses the heater must be installed with fresh air for combustion.

Failure to do so may result in death, serious injury, property damage or illness from Carbon Monoxide poisoning.

A.BASIC FLUE VENTING — Venting must comply with the latest edition of the National Fuel Gas Code (ANSI Z223.1-latest edition) or the authority having jurisdiction. Other venting references are in the equipment volume of the ASHRAE Handbook.

Model	Heat	Maximum vent length ft.	Maximum Fresh air	Max. combination of
	exchanger	(4” diameter)	intake length ft (4”	fresh air and vent ft. (4”
	length ft		diameter)	diameter)
PTS/U 40	20	45	50	75
PTS/U 50	20	45	50	75
PTS/U 50	30	35	40	65
PTS/U 75	20	45	50	75
PTS/U 75	30	35	40	65
PTS/U 100	30	45	50	75
PTS/U 100	40	35	40	65
PTS/U 125	30	60	50	75
PTS/U 125	40	50	40	65
PTS/U 125	50	40	30	55
PTS/U 150	40	60	50	75
PTS/U 150	50	50	40	65
PTS/U 150	60	40	30	55
PTS/U 175	50	60	50	75
PTS/U 175	60	50	40	65
PTS/U 175	70	40	30	55
PTS/U 200	50	60	40	65
PTS/U 200	60	50	30	55
PTS/U 200	70	40	30	45

Vent lengths shown in the table are for horizontal and vertical venting. If a longer length of vertical or horizontal venting is required contact the manufacturer for assistance with vent sizing.

	Form #43343330
–34–	May 08