Component Identification
309524V
9
General Information
Selecting Tubing
Fluid loses some heat through the tubing or hose
between the heater and spray gun. Locate heater close
to the spray area to minimize heat loss through plumb-
ing.
The chart in F
. 2 shows a heat loss curve for 3 com-
mon types of tubing.
Chart Notes:
•
Higher flow rates have less heat loss.
•
Foam-insulated steel tubing and high pressure air-
less paint hose retain heat best. Insulated tubing
and hose are more expensive, but higher costs are
commonly offset by lower operating costs.
•
Locate heater close to spray area to minimize heat
loss through plumbing.
•
Select system components that meet tempera-
ture and pressure ratings listed in
, page 28. The heater’s normal output range
is adjustable from 84-220°F (29-104°C).
•
To prevent fire and explosion, locate heater away
from all flammable materials and where opera-
tors will not come in contact with hot metal sur-
faces.
•
To avoid burns, insulate and/or label lines and
components exiting heater that may become hot.
NOTICE
The inlet fluid temperature cannot exceed 275°F
(135°C). This will cause the heater to exceed its rated
temperature code.
F
IG
. 2: Typical Temperature Drop
Heat Loss Curve - 70° F (21° C) ambient
T
ypical
Fluid
T
emperature
Dr
op
Flow Rate
(20 ft.) 6.1 m steel tube
Fluid: (130° F) 54° C
(20 ft.) 6.1 m steel tube
(3/8 in.) 9 mm foam insulation
Fluid: (110° F) 43° C
(20 ft.) 6.1 m airless paint hose
Fluid: (110° F) 43° C
