Lochinvar SNA285-125 Manuale Utente

       

Installation & Service Manual

TM

Use only cleaners, primers, and solvents 
that are approved for the materials which 
are joined together.

1.  Work from the water heater to vent or air termination.  
 

Do not exceed the lengths given in this manual for the 

 

air or vent piping.

2.  Cut pipe to the required lengths and deburr the inside 
 

and outside of the pipe ends.

3.  Chamfer outside of each pipe end to ensure even 
 

cement distribution when joining.  

4.  Clean all pipe ends and fittings using a clean dry rag.  
 

(Moisture will retard curing and dirt or grease will prevent 

 adhesion.)

5.  Dry fit vent or air piping to ensure proper fit up before 
 

assembling any joint.  The pipe should go a third to         

 

two-thirds into the fitting to ensure proper sealing after 

 

cement is applied.

6. Priming 

and 

Cementing:

 

a.  Handle fittings and pipes carefully to prevent 

  contamination 

of 

surfaces.

 
 

b.  Apply a liberal even coat of primer to the fitting 

 

 

socket and to the pipe end to approximately 1/2" 

 

 

beyond the socket depth.

 
 

c.  Apply a second primer coat to the fitting socket.

 
 

d.  While primer is still wet, apply an even coat of 

 

 

approved cement to the pipe equal to the depth of 

 

 

the fitting socket along with an even coat of 

 

 

approved cement to the fitting socket.

 
 

e.  Apply a second coat of cement to the pipe.

 
 

f. 

While the cement is still wet, insert the pipe into 

 

 

the fitting, if possible twist the pipe a 1/4 turn as 

 

 

you insert it.  NOTE:  If voids are present, 

 

 

sufficient cement was not applied and joint could 

  be 

defective.

 
 

g. 

Wipe excess cement from the joint removing ring or 

 

 

beads as it will needlessly soften the pipe.

All PVC vent pipes must be glued, properly 
supported, and the exhaust must be pitched 
a minimum of a 1/4 inch per foot back to 
the water heater (to allow drainage of 
condensate).

 WARNING The vent connection to the appliance must 

be made with the starter CPVC pipe section 
provided with the appliance if PVC/CPVC 
vent is to be used.  The field provided 
vent fittings must be cemented to the 
CPVC pipe section using an “All Purpose 
Cement” suitable for PVC and CPVC pipe.  
Use only the vent materials, primer, and 
cement specified in Table 3D to make 
the vent connections.  Failure to follow 
this warning could result in fire, personal 
injury, or death.

 WARNING

Insulation should not be used on PVC 
or CPVC venting materials.  The use of 
insulation will cause increased vent wall 
temperatures, which could result in vent 
pipe failure.

PVC Schedule 40, 80 ANSI/ASTM D1785

PVC - DWV

ANSI/ASTM D2665

CPVC Schedule 40, 80 ANSI/ASTM F441

PVC Schedule 40

ANSI/ASTM D2466

PVC Schedule 80

ANSI/ASTM D2467

CPVC Schedule 80

ANSI/ASTM F439

PVC

ANSI/ASTM D2564

CPVC

ANSI/ASTM F493

This product has been approved for use with the PVC/CPVC 
vent materials listed in Table 3D.

NOTE:  In Canada, CPVC and PVC vent pipe, fi ttings and cement/
primer must be ULC-S636 certifi ed.

VENT

4" CPVC PIPE INSTALLED IN THE
WATER HEATER MUST BE USED
FOR VENT CONNECTION

NOTE:  CPVC VENT PIPE AND VENT FITTINGS MUST BE USED 
IN CLOSET AND ALCOVE INSTALLATIONS.