Roberts Gorden Corayvac CRV-B Series, Инструкция по установке, эксплуатации и обслуживанию

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CRV-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
46 of 85
SECTION 10: OUTSIDE AIR SUPPLY
The CRV-Series system is appro v ed for u se w ith an
o u tside air system. Halogenated hydrocarbons or
other corrosi v e chemicals in the air can be dra w n into
the eq u ipment and serio u sly damage the system
components. A v oid the u se of s u ch chemical
compo u nds near the air inlet to the heaters.
IMPORTANT: If the b u ilding has a slight negati v e
press u re or corrosi v e contaminants are present in the
air, an o u tside comb u stion air s u pply to the heater is
req u ired.
All joints and seams in the air s u pply system m u st be
airtight. Attach the filter ho u sing to the b u rner
assembly u sing the w ing n u t pro v ided.
Note: O u tside air terminal m u st not be more than 1'
(31 cm) abo v e the v ent termination w hile maintaining
a minim u m distance of 3' (93 cm) for both v ertical
and horizontal v enting.
10.1 Pressurized
See Page 49, Figure 34 for a typical layo u t of a
press u rized air s u pply system.
For press u rized o u tside air s u pplies, the o u tside air
blo w er motor has a press u re s w itch that m u st be
u sed. Wire this s w itch in series w ith the p u mp
press u re s w itch. When u sing an o u tside air blo w er
w ith a CORAYVAC
®
Heating Control or CORAYVAC
®
Mod u lating Heating Control or relay transformer, a
separate load relay package is req u ired. Wire the
control for the relay in parallel w ith the p u mp. The
o u tside air blo w er m u st ha v e a separate 20 A, 120 V
po w er s u pply. See Page 47, Figure 31 for o u tside air
blo w er internal w iring req u irements. The o u tside air
blo w er has an adj u stable internal damper that sho u ld
be w ide open. On smaller systems (abo u t 3 b u rners)
this damper might need to be closed u p to half w ay if
the press u re s w itch does not make.
10.2 Non-Pressurized
For a non-press u rized o u tside air s u pply, a 4" (O.D.)
single w all pipe d u ct may be attached to the b u rner
and end v ent. For length and d u ct sizing
req u irements, see d u ct design r u les in Figure 30 . To
pre v ent condensation, ins u late the o u tside air d u ct.
CAUTION
Product Damage Hazard
Do not use heater in area containing
corrosive chemicals.
Refer to appropriate Material Safety Data
Sheets (MSDS).
Failure to follow these instructions can result
in product damage.